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  1. #1
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    Default 1965 Buick LeSabre 400 Package

    I was told today that the 400 package on the 65 Buick LeSabre was just a trim package and that the only engine choice available was the 300 with either a 2 or 42 barrel carb. I've always thought the 400 models had a bigger engine. Can anyone add information on this topic?

  2. #2
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    Default Re: 1965 Buick LeSabre 400 Package

    I beleive 66 LeSabre 400's had a 401 in them...seen a few but i could be wrong. Time to get out the dealership book.......

    Peace WildBill
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  3. #3
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    Default Re: 1965 Buick LeSabre 400 Package

    If I'm correct, the "400" had more to do with it being a TH400 package than anything else.
    Diego
    1970 Oldsmobile 4-4-2 W-30 Ragtop
    Documented Dover Downs pace car

  4. #4
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by Topcat View Post
    I beleive 66 LeSabre 400's had a 401 in them...seen a few but i could be wrong. Time to get out the dealership book.......

    Peace WildBill
    I was also under the impression that the LeSabre 400 had a 401 engine with a TH400. My Dad had one back in 1965 and it was an awsome car and I've always wanted to get one. I heard that one is for sale nearby with a 300cu in motor.

  5. #5
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by 442w30 View Post
    If I'm correct, the "400" had more to do with it being a TH400 package than anything else.
    Don't know on the '65, but the Motor's Auto Repair Manual does list a 400 V8 (code LR '65 & MR '66 along with 401 motor's LT,LW & MT) in the Engine Identification section.

    Tho no 400 is displayed for 1965,66 in the "General Engine Specs" or "Tune Up Specs sections" shown right after "Engine ID" section.

    We all know that the Buick bigblocks were all Nailheads thru 1966, so hopefully someone will add on to this thread on the Mystery "400" of 1965, 66.
    Since Turbo 400's were available around 1964 and definitely in '65, maybe the 400 LeSabre denotes the Turbo 400

    I only know for sure thay on my Dad's '67 Sportwagon 400, that the 400 in a small rectangle red badge with Chrome number's on the 1/4 panel meant Turbo 400 Tranny behind the 340-4 motor.

    By 1968 & '69 it meant 400 c.i. motor as in the GS 400 cars.
    For Sale: 1970 GS455 Sloan Docs, AM&P 464", HURST AUTOSTICK I on a Turbo 400 w/3200 Stall, 8.5" 3.73 Rear, Mirror Black finish, Mint Deluxe interior with Arm Rest, Sweet, Driveable, and Nasty Sounding GSCA Exhaust with X-pipe, etc, etc. $29.5k

    1971 GS455 #'s Matching WE4, original Build Sheet (was above Gas Tank),**SOLD**
    ****************************************
    '71 Stage 1 Conv, Auto,
    A/C,Buckets/Console/SOLD
    (it may be gone, but always remembered with a Big Grin!)

  6. #6
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    Default Re: 1965 Buick LeSabre 400 Package

    For several years, the 400 term was used for a actual 401 engine... because of the ban by corporate on engines over 400 in. in the smaller car bodies....
    It was not unusual.... for instance,,, chevrolet never produced a 396 cu. in. engine... they all were actually 400 inches...
    Doc "Widely unknown"

  7. #7
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by 442w30 View Post
    If I'm correct, the "400" had more to do with it being a TH400 package than anything else.
    I believe Diego is correct. It was somewhat of a HD or towing package. The option lasted into the late '60s, and, at least for the closing years of the option, it certainly did not refer to engine displacement since late '60s LeSabres were limited to small blocks only.
    Glen Robins
    BPG #1857
    '80 LeSabre: '70 350-4, 8.5" with 3.42s
    - built and formerly owned by Floydsbuick
    "All your pretty chrome and paint means nothing if you're watching a pair of shrinking taillights from a primered big-block Vega." -- Jake Amatisto

  8. #8
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    Wink Re: 1965 Buick LeSabre 400 Package

    I had a '66 LeSabre "400" package,very plain trim/interior.But,it had 340-4,ST400 & posi.
    Jamie McClintonPride and joy '65 Special convertible w/340-4
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  9. #9
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by doc View Post
    For several years, the 400 term was used for a actual 401 engine... because of the ban by corporate on engines over 400 in. in the smaller car bodies....
    It was not unusual.... for instance,,, chevrolet never produced a 396 cu. in. engine... they all were actually 400 inches...
    FYI:

    For the "396" Bore = 4.094 Stroke = 3.76

    Volume of a cylinder = Pi x radius squared x height

    = 3.14 x (2.047 x 2.047) x 3.76

    = 49.47 cu. in. per cylinder

    = 49.47 x 8 = 395.76 cu. in. per engine

    = actually comes to 395.9 when you don't round off


    For the "402" Bore = 4.124 Stroke = 3.76

    = 401.76 cu. in. when you do the calculation.


    For the "400" small block Bore = 4.125 Stroke = 3.75

    = 400.92 cu. in.
    Mike W

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  10. #10
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    Default Re: 1965 Buick LeSabre 400 Package

    I had a 66 LeSabre 400 convertible with a 340 in it. Can't remember what tranny she had.

    1967 Skylark parts car

    1967 GS 400 2 dr ht parts car

    1967 GS 400 convertible parts car

    2002 GMC Savana

  11. #11
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    Default Re: 1965 Buick LeSabre 400 Package

    I know for a fact that in '69, the LeSabre 400 was the 350 motor with the TH400 instead of the Th350
    Alan W

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    Quote Originally Posted by 442w30 View Post
    ... They have awkward proportions from certain angles, and they look dumpy compared to their GM brethren
    ....'68 SportWagon400 "Sportn'Wood"..............'69 GS400 Convert "BigRed"..........

  12. #12
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by 65specialconver View Post
    I had a '66 LeSabre "400" package,very plain trim/interior.But,it had 340-4,ST400 & posi.
    I love it! That's almost like a family man's hot rod.
    Glen Robins
    BPG #1857
    '80 LeSabre: '70 350-4, 8.5" with 3.42s
    - built and formerly owned by Floydsbuick
    "All your pretty chrome and paint means nothing if you're watching a pair of shrinking taillights from a primered big-block Vega." -- Jake Amatisto

  13. #13
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    Default Re: 1965 Buick LeSabre 400 Package

    I also have production figures for this package, if anyone is interested.
    Diego
    1970 Oldsmobile 4-4-2 W-30 Ragtop
    Documented Dover Downs pace car

  14. #14
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    Default Re: 1965 Buick LeSabre 400 Package

    My 65 lesabre has the 400 package.
    It came with a 4 barrel 300cu engine & the st-400 tranny.
    I have never seen a 65 or 66 lesabre with a 401 or 425 nailhead from
    the factory.
    It was my understanding that if you wanted the larger engine you would
    have to buy the wildcat....which had the longer wheelbase.

    Tom
    Tom
    1965 Lesabre (455ci/ST-400/3.73gears)
    1968 Skylark (gone)
    1986 Century (gone)
    1994 Lesabre (140,000 miles)

  15. #15
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by atticus427 View Post
    FYI:

    For the "396" Bore = 4.094 Stroke = 3.76

    Volume of a cylinder = Pi x radius squared x height

    = 3.14 x (2.047 x 2.047) x 3.76

    = 49.47 cu. in. per cylinder

    = 49.47 x 8 = 395.76 cu. in. per engine

    = actually comes to 395.9 when you don't round off


    For the "402" Bore = 4.124 Stroke = 3.76

    = 401.76 cu. in. when you do the calculation.


    For the "400" small block Bore = 4.125 Stroke = 3.75

    = 400.92 cu. in.

    Here is some more info-

    But to confuse everyone in 70 GM mfg'd a sbc 400 ,an LS3 bbc 402 330hp called a 400 along with a bbc called -advertised as an L34 396/350hp in the chevelle ss/camaro ss/nova ss/elky ss that was really 402 cid.
    Gerry
    1972 GS 350 ht #s
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  16. #16
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by gstewart View Post
    Here is some more info-

    But to confuse everyone in 70 GM mfg'd a sbc 400 ,an LS3 bbc 402 330hp called a 400 along with a bbc called -advertised as an L34 396/350hp in the chevelle ss/camaro ss/nova ss/elky ss that was really 402 cid.
    Yes, crazy indeed.
    396=396 from 1965-1969 on all Bowtie models.
    396=402 on any marketed 396 car from 1970 on up

    BUT: 400=402 big block & 400 small block, on any marketed 400 car! LoL.
    Glad I learned a few more models were available with the Turbo 400 tranny bolted behind the Buick Smallblocks, besides my Dad's '67 Sportwagon 400
    For Sale: 1970 GS455 Sloan Docs, AM&P 464", HURST AUTOSTICK I on a Turbo 400 w/3200 Stall, 8.5" 3.73 Rear, Mirror Black finish, Mint Deluxe interior with Arm Rest, Sweet, Driveable, and Nasty Sounding GSCA Exhaust with X-pipe, etc, etc. $29.5k

    1971 GS455 #'s Matching WE4, original Build Sheet (was above Gas Tank),**SOLD**
    ****************************************
    '71 Stage 1 Conv, Auto,
    A/C,Buckets/Console/SOLD
    (it may be gone, but always remembered with a Big Grin!)

  17. #17
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    Default Re: 1965 Buick LeSabre 400 Package

    The first Buick I ever drove was a 64 Special with a 300- 2barrel. It was reliable but not much on power. The 65 LeSabre 400 convertable that my Dad drove had a lot more power. Being a larger car I always thought that it must have had a 401 because the two cars weren't anything alike when you compared the power they eached seemed to have.

  18. #18
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    Default Re: 1965 Buick LeSabre 400 Package

    Quote Originally Posted by Rad005 View Post
    The first Buick I ever drove was a 64 Special with a 300- 2barrel. It was reliable but not much on power. The 65 LeSabre 400 convertable that my Dad drove had a lot more power. Being a larger car I always thought that it must have had a 401 because the two cars weren't anything alike when you compared the power they eached seemed to have.
    Big help on pep with the 2.48 first gear, 1.48 second of the Turbo 400 tranny in Dad's LeSabre, vs. the 1.76 or so first gear ratio that was in that 2 speed auto in the Special.
    For Sale: 1970 GS455 Sloan Docs, AM&P 464", HURST AUTOSTICK I on a Turbo 400 w/3200 Stall, 8.5" 3.73 Rear, Mirror Black finish, Mint Deluxe interior with Arm Rest, Sweet, Driveable, and Nasty Sounding GSCA Exhaust with X-pipe, etc, etc. $29.5k

    1971 GS455 #'s Matching WE4, original Build Sheet (was above Gas Tank),**SOLD**
    ****************************************
    '71 Stage 1 Conv, Auto,
    A/C,Buckets/Console/SOLD
    (it may be gone, but always remembered with a Big Grin!)

  19. #19
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    Default Re: 1965 Buick LeSabre 400 Package

    The 1966 LeSabre 400 included a 340 with four barrel and the SP 400 Transmission.

    If anyone wants more informations I could scan a Buick brochure.

  20. #20
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    Default Re: 1965 Buick LeSabre 400 Package

    And just for the record, a Buick 401 is actually 400.84 Cu. In. A 425 is 425.27 Cu. in.
    John Codman
    Formerly owned Buicks:
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  21. #21
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    Default Re: 1965 Buick LeSabre 400 Package

    And a 396 chebby is actually a 400....
    Doc "Widely unknown"

 

 

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