Street/strip 400/430/455

Building your GS motor? Ask all questions relating to the late big block here.

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  1. jhems17

    Header collectors and pipe size

    jhems17, Oct 24, 2023
    Replies:
    8
    Views:
    358
    jhems17
    Oct 29, 2023
  2. TommyV

    Am i leaving anything on the table?

    TommyV, Oct 23, 2023 ... 2
    Replies:
    26
    Views:
    1,103
    TommyV
    Dec 5, 2023
  3. Tom Raschka

    1379242 crankshaft

    Tom Raschka, Oct 23, 2023
    Replies:
    2
    Views:
    225
    Tom Raschka
    Oct 25, 2023
  4. dan zepnick

    Composite intake gasket installation?

    dan zepnick, Oct 20, 2023
    Replies:
    12
    Views:
    380
    Mark Demko
    Oct 23, 2023
  5. Stevem

    Seal warning

    Stevem, Oct 18, 2023
    Replies:
    3
    Views:
    247
    Schurkey
    Oct 18, 2023
  6. Deogi2

    #380 engine diagnosis help

    Deogi2, Oct 17, 2023 ... 2 3
    Replies:
    41
    Views:
    1,500
    Mark Demko
    Apr 29, 2024 at 3:16 AM
  7. Al T

    455 to 350 in a '67 Skylark

    Al T, Oct 17, 2023
    Replies:
    7
    Views:
    178
    nekkidhillbilly
    Oct 18, 2023
  8. Canadian GS 350

    7 blade 18 inch versus 5 blade 20 inch for best cooling

    Canadian GS 350, Oct 16, 2023
    Replies:
    13
    Views:
    608
    Gary Bohannon
    Nov 10, 2023
  9. socal rider

    1968 430 oil mods

    socal rider, Oct 15, 2023 ... 2 3
    Replies:
    40
    Views:
    1,285
    VET
    Oct 27, 2023
  10. Canadian GS 350

    Dyno results with the 290-94 H cam

    Canadian GS 350, Oct 8, 2023
    Replies:
    3
    Views:
    467
    Mark Demko
    Oct 10, 2023
  11. gs430

    71 stage 1 iron heads on '68 430?

    gs430, Oct 6, 2023
    Replies:
    15
    Views:
    698
    436'd Skylark
    Oct 23, 2023
  12. Al T

    400 Crank and Rod Question. Interchangeability

    Al T, Oct 6, 2023
    Replies:
    4
    Views:
    267
    Al T
    Oct 10, 2023
  13. eagleguy

    455 cu 1970 vs 1972

    eagleguy, Oct 2, 2023 ... 2
    Replies:
    26
    Views:
    1,070
    rjay
    Oct 6, 2023
  14. stall1970

    Jahns piston

    stall1970, Sep 27, 2023
    Replies:
    2
    Views:
    234
    VET
    Sep 27, 2023
  15. Canadian GS 350

    Break in oil viscosity

    Canadian GS 350, Sep 26, 2023 ... 2
    Replies:
    22
    Views:
    732
    Fox's Den
    Oct 6, 2023
  16. VET

    Does PCV pull oil and carbon deposits into the intake manifold?

    VET, Sep 25, 2023
    Replies:
    19
    Views:
    812
    VET
    Oct 9, 2023
  17. got_tork

    Stock Connecting Rods

    got_tork, Sep 25, 2023 ... 2 3
    Replies:
    40
    Views:
    1,488
    tubecatgs
    Feb 18, 2024
  18. 12lives

    AC Bracket Trivia

    12lives, Sep 24, 2023
    Replies:
    6
    Views:
    216
    Nearing
    Sep 25, 2023
  19. Frankie70GS

    Header gasket port matching

    Frankie70GS, Sep 20, 2023 ... 2
    Replies:
    21
    Views:
    756
    hugger
    Sep 26, 2023
  20. Canadian GS 350

    SPX intake - port to match gasket or as cast……hp difference ?

    Canadian GS 350, Sep 20, 2023
    Replies:
    10
    Views:
    548
    Bens99gtp
    Sep 21, 2023
  21. robert v

    Cast iron cylinder head question (is damage repairable?)

    robert v, Sep 18, 2023
    Replies:
    7
    Views:
    440
    Stevem
    Sep 20, 2023
  22. Jeremy Zepnick

    Lost dang it!

    Jeremy Zepnick, Sep 16, 2023
    Replies:
    5
    Views:
    304
    2manybuicks
    Sep 17, 2023
  23. WQ59B

    Header heat vs. PS

    WQ59B, Sep 15, 2023
    Replies:
    6
    Views:
    370
    NZ GS 400
    Oct 12, 2023
  24. 1969briviera

    Buick's head design

    1969briviera, Sep 13, 2023 ... 2 3 4
    Replies:
    67
    Views:
    1,983
    PGSS
    Sep 18, 2023
  25. VET

    How important is it to have a good .040 squish/quench?

    VET, Sep 11, 2023 ... 2 3 4
    Replies:
    73
    Views:
    2,157
    Mark Demko
    Sep 26, 2023
  26. Houndogforever

    Starter issues on 455.

    Houndogforever, Sep 6, 2023
    Replies:
    9
    Views:
    258
    BUICKRAT
    Sep 7, 2023
  27. theone61636

    Engine Carnage

    theone61636, Sep 4, 2023 ... 2
    Replies:
    25
    Views:
    1,199
    TheSilverBuick
    Oct 23, 2023
  28. Utah455

    Spark plug wire recommendation for 455

    Utah455, Aug 29, 2023 ... 2 3 4
    Replies:
    62
    Views:
    2,097
    Max Damage
    Jan 3, 2024
  29. VET

    What is normal water temperature for a 455 engine with A/C engaged?

    VET, Aug 29, 2023 ... 2 3
    Replies:
    53
    Views:
    1,303
    VET
    Sep 23, 2023
  30. got_tork

    430 Rocker Arms

    got_tork, Aug 28, 2023
    Replies:
    2
    Views:
    225
    DaWildcat
    Aug 28, 2023
  31. George D.

    Head bolt suggestions? Shanked? Call ARP?

    George D., Aug 22, 2023
    Replies:
    15
    Views:
    357
    Schurkey
    Aug 23, 2023
  32. RellyRell3605

    Won't stay running

    RellyRell3605, Aug 20, 2023
    Replies:
    16
    Views:
    490
    LARRY70GS
    Aug 22, 2023
  33. Big Twist

    455 overheated 1975 Lesabre

    Big Twist, Aug 18, 2023 ... 2
    Replies:
    27
    Views:
    833
    CanadaCat
    Sep 8, 2023
  34. 68Buick-Jim

    Main bearing cap bolt torque spec.

    68Buick-Jim, Aug 18, 2023
    Replies:
    11
    Views:
    451
    rjay
    Aug 22, 2023
  35. VET

    What is the difference between Manifold & Ported Vacuum Advance? Which one should I use?

    VET, Aug 16, 2023 ... 2
    Replies:
    28
    Views:
    3,902
    Schurkey
    Dec 24, 2023
  36. Canadian GS 350

    Cam id?

    Canadian GS 350, Aug 15, 2023
    Replies:
    2
    Views:
    214
    DaWildcat
    Aug 15, 2023
  37. Canadian GS 350

    Piston brand ?

    Canadian GS 350, Aug 15, 2023
    Replies:
    9
    Views:
    440
    Canadian GS 350
    Aug 16, 2023
  38. hvramesq

    Please help Identify

    hvramesq, Aug 14, 2023
    Replies:
    3
    Views:
    194
    Matt Knutson
    Aug 14, 2023
  39. hvramesq

    1971 stage 1 head ID

    hvramesq, Aug 11, 2023
    Replies:
    2
    Views:
    245
    thepartsman
    Aug 12, 2023
  40. APVGS

    430 Head Porting

    APVGS, Aug 10, 2023
    Replies:
    14
    Views:
    537
    Stevem
    Sep 12, 2023
  41. 1969briviera

    Oil consumption 430ci

    1969briviera, Aug 10, 2023 ... 2 3 4
    Replies:
    72
    Views:
    2,035
    1969briviera
    Aug 18, 2023
  42. mattd3933

    Building a project 71 GS. looking for Distributor advice

    mattd3933, Aug 7, 2023
    Replies:
    12
    Views:
    450
    Canadian GS 350
    Aug 9, 2023
  43. 69WILD

    Slop in original timing chain on 78k 430

    69WILD, Aug 5, 2023 ... 4 5 6
    Replies:
    107
    Views:
    2,734
    Schurkey
    Nov 20, 2023
  44. George D.

    Intake manifold gasket/ valley pan- which one?

    George D., Aug 4, 2023
    Replies:
    2
    Views:
    273
    hugger
    Aug 4, 2023
  45. 70staged

    3" exhaust

    70staged, Aug 2, 2023
    Replies:
    10
    Views:
    517
    BrianTrick
    Aug 4, 2023
  46. knucklebusted

    Left Me on the Side of the Road! Now What?

    knucklebusted, Aug 1, 2023 ... 2 3 4
    Replies:
    61
    Views:
    2,430
    knucklebusted
    Sep 3, 2023
  47. VET

    Upgrade a Base 455 to a Stage 1 Engine

    VET, Aug 1, 2023 ... 2 3 4
    Replies:
    68
    Views:
    1,775
    TrunkMonkey
    Aug 7, 2023
  48. rkammer

    Pertronix interface with tachometers

    rkammer, Jul 29, 2023
    Replies:
    4
    Views:
    351
    Bigpig455
    Aug 7, 2023
  49. VET

    Who has heard the thin-walled cylinder 455 engine is prone to overheating.

    VET, Jul 26, 2023 ... 3 4 5
    Replies:
    81
    Views:
    2,338
    VET
    Oct 11, 2023
  50. Note 1970

    Compression estimate

    Note 1970, Jul 26, 2023
    Replies:
    10
    Views:
    357
    Mark Demko
    Jul 27, 2023
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