1958 rear end swap

Discussion in 'A boatload of fun' started by JayZee88, Nov 5, 2019.

  1. JayZee88

    JayZee88 Well-Known Member

    If someone was to do a rear end swap on a 58 Buick (not a 61-62 3rd member swap), what are some cars to source for a rear end?

    Im looking to use stock rims, has to have (or repop posi rear), and not have to modify the sheet metal.

    Im thinking of a Ford 9 inch, but dont know what years or kinds of cars to search for a rear end.
     
  2. 66electrafied

    66electrafied Just tossing in my nickel's worth

    That's going to be a lot of work.
    I once looked into changing out a rear end in an old Invicta, but decided against it once it became apparent that I'd have to do a lot of fabricating, which is something I've never tried.
    Are you planning on keeping the Dynaflow or are you getting rid of it too? The reason I'm asking is because the torque ball assembly would have to be swapped out, and then the driveshaft would have to be made up along with trailing arms or leaf springs, depending on what you're doing. The Buick, as you probably know, is a closed torque tube style drive train. As for Ford 9-inch, anything out of the 60s and 70s can be made to work. You'll probably have to cut it down regardless in order to fit the Buick.
    I'm sure there are a few people on this board who've successfully swapped a more modern rear end into a pre-60 Buick, try the "Classic Buicks" thread if you don't get a better answer here.
    The 9 inch is probably the best rear end going, and you'll probably want to find a 65-66 TH 400 transmission if you're keeping the Nailhead. Lots of threads all over the board on how that's done.
     
  3. WQ59B

    WQ59B Well-Known Member

    I have an open driveshaft & a Dana 60 under my ‘59. The above is correct: lots of work & fabrication.
     
  4. JayZee88

    JayZee88 Well-Known Member

    I have done this before to a 59 LeSabre. I got a 61 3rd member and torque tube eliminator kit from Russ Martin (I still have it). My reason for needing a swap is because I am putting a 600hp 455 under the hood. My 70 Electra is going to require more work then I want to invest to handle that power. A 58 is what I have always wanted and was planning on doing this swap.
     
  5. telriv

    telriv Well-Known Member

    Why not look into Jag front & rear suspensions. Comes with front & rear discs, rack & pinion, is made for the weight, etc. I've seen it done & it's not as hard as you may think.
    Do a search & I'm sure you'll find what your looking for.
     
  6. WQ59B

    WQ59B Well-Known Member

    There were 4000+lb Jags with 600 hp?
     
    Last edited: Nov 6, 2019
  7. JayZee88

    JayZee88 Well-Known Member

    My aim is to retain as much of the original fabric with this coversion. Using stock steering, brakes, etc. The best way to do that would be to find a 59-60 buick posi rear (but rear end rebuild kits are impossible to find and very rare). Next best thing is to do a swap with a era correct rear end with posi. The Dana and Ford 9 seems to be the best way to go, but what kind of cars/trucks should I be looking for?
     
  8. WQ59B

    WQ59B Well-Known Member

    ‘59-60 rears are still ‘Buick weird’. The U-joint is way out from the pumpkin, and I’m not sure you use one with an open driveshaft.
    You might also consider a ‘57-64 BOP front loader rear; favorite of draggers thru the years. I have a good P-60 rear out here in NJ available...
     
  9. JayZee88

    JayZee88 Well-Known Member

    I will keep that in mind when I acquire a 58 I have my eyes set on. Do they repop 3rd members and offer posi with your p60 rear end?
     
  10. WQ59B

    WQ59B Well-Known Member

    posi- yes. Repro/aftermarket 3rd members- couldn’t tell you.
     
    JayZee88 likes this.

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