Street/strip 400/430/455

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

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  1. 70Riv455

    T-Stat Housing leak.

    70Riv455, Nov 22, 2023
    Replies:
    7
    Views:
    194
    70Riv455
    Nov 22, 2023
  2. Bigpig455

    455 Coolant Leak

    Bigpig455, Nov 20, 2023
    Replies:
    13
    Views:
    371
    Mark Demko
    Nov 22, 2023
  3. accelr8

    First engine build and have an unusual thrust bearing question

    accelr8, Nov 20, 2023
    Replies:
    7
    Views:
    365
    accelr8
    Nov 21, 2023
  4. wormwood

    Ok dumb question of the day

    wormwood, Nov 20, 2023
    Replies:
    13
    Views:
    391
    SpecialWagon65
    Nov 21, 2023
  5. Utah455

    Install a new Fan Shroud - How to, what needs to be removed/not removed?

    Utah455, Nov 20, 2023
    Replies:
    11
    Views:
    315
    TommyV
    Nov 20, 2023
  6. 69WILD

    Slop in original timing chain on 78k 430

    69WILD, Aug 5, 2023 ... 4 5 6
    Replies:
    107
    Views:
    2,662
    Schurkey
    Nov 20, 2023
  7. ROCK N ROLL GSX

    STAGE 2 HOOD SCOOP x 3

    ROCK N ROLL GSX, Jan 14, 2023 ... 2 3
    Replies:
    42
    Views:
    2,745
    ROCK N ROLL GSX
    Nov 17, 2023
  8. VET

    Looking for suggestions and expert advice: Upgrading my 1970 455 engine to a modern 455 engine

    VET, Nov 1, 2023 ... 6 7 8
    Replies:
    152
    Views:
    3,907
    BUICKRAT
    Nov 16, 2023
  9. 1969briviera

    430 heads

    1969briviera, Nov 28, 2016 ... 2
    Replies:
    27
    Views:
    1,422
    Stg'd 2Discover
    Nov 15, 2023
  10. Emil H

    The right q-jet for a 455

    Emil H, Nov 10, 2023 ... 2
    Replies:
    20
    Views:
    666
    Emil H
    Nov 14, 2023
  11. Canadian GS 350

    Spx intake with stock ac brackets ….anyone done this?

    Canadian GS 350, Nov 12, 2023
    Replies:
    4
    Views:
    222
    TheSilverBuick
    Nov 13, 2023
  12. socal rider

    New to me 455

    socal rider, Nov 10, 2023
    Replies:
    4
    Views:
    248
    Schurkey
    Nov 11, 2023
  13. Canadian GS 350

    In preparation for chassis dyno

    Canadian GS 350, Nov 6, 2023
    Replies:
    13
    Views:
    375
    Canadian GS 350
    Nov 11, 2023
  14. Canadian GS 350

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

    Canadian GS 350, Oct 16, 2023
    Replies:
    13
    Views:
    601
    Gary Bohannon
    Nov 10, 2023
  15. jaystoy

    Header install question

    jaystoy, Nov 7, 2023
    Replies:
    14
    Views:
    467
    jaystoy
    Nov 9, 2023
  16. 70Riv455

    Stupid Coolant question...

    70Riv455, Nov 7, 2023
    Replies:
    9
    Views:
    409
    70Riv455
    Nov 8, 2023
  17. RoseBud68

    No spark from the coil.

    RoseBud68, Nov 5, 2023
    Replies:
    11
    Views:
    292
    RoseBud68
    Nov 7, 2023
  18. 70Riv455

    455 Oil Change

    70Riv455, Nov 5, 2023
    Replies:
    7
    Views:
    273
    70Riv455
    Nov 5, 2023
  19. nekkidhillbilly

    Iron Head question

    nekkidhillbilly, Oct 29, 2023 ... 2
    Replies:
    21
    Views:
    835
    nekkidhillbilly
    Nov 4, 2023
  20. 87GN_70GS

    Port match SP1 or not?

    87GN_70GS, Oct 31, 2023
    Replies:
    4
    Views:
    305
    Stevem
    Nov 2, 2023
  21. AtlBantam430

    430 build for different type project...

    AtlBantam430, Oct 25, 2023
    Replies:
    19
    Views:
    761
    AtlBantam430
    Oct 29, 2023
  22. jhems17

    Header collectors and pipe size

    jhems17, Oct 24, 2023
    Replies:
    8
    Views:
    349
    jhems17
    Oct 29, 2023
  23. 70Riv455

    Oil Pan gasket replacement 455

    70Riv455, Oct 27, 2023
    Replies:
    6
    Views:
    276
    Quick Buick
    Oct 28, 2023
  24. socal rider

    1968 430 oil mods

    socal rider, Oct 15, 2023 ... 2 3
    Replies:
    40
    Views:
    1,249
    VET
    Oct 27, 2023
  25. Jesse Tackett

    Kenne Bell 455 lifters, bottom coated?

    Jesse Tackett, Oct 27, 2023
    Replies:
    3
    Views:
    228
    Jesse Tackett
    Oct 27, 2023
  26. jzuelly1

    flexplate bolts

    jzuelly1, May 4, 2015
    Replies:
    12
    Views:
    1,611
    jzuelly1
    Oct 25, 2023
  27. Tom Raschka

    1379242 crankshaft

    Tom Raschka, Oct 23, 2023
    Replies:
    2
    Views:
    221
    Tom Raschka
    Oct 25, 2023
  28. section8mainiac

    BBB w/1970 Heads on 1971 Block & HP/TQ guess

    section8mainiac, Oct 24, 2023
    Replies:
    2
    Views:
    194
    pbr400
    Oct 24, 2023
  29. gs430

    71 stage 1 iron heads on '68 430?

    gs430, Oct 6, 2023
    Replies:
    15
    Views:
    689
    436'd Skylark
    Oct 23, 2023
  30. theone61636

    Engine Carnage

    theone61636, Sep 4, 2023 ... 2
    Replies:
    25
    Views:
    1,189
    TheSilverBuick
    Oct 23, 2023
  31. dan zepnick

    Composite intake gasket installation?

    dan zepnick, Oct 20, 2023
    Replies:
    12
    Views:
    374
    Mark Demko
    Oct 23, 2023
  32. 436'd Skylark

    B4B vs. SP-1 and a quest for mileage..

    436'd Skylark, Aug 3, 2020 ... 2
    Replies:
    36
    Views:
    3,167
    Quick Buick
    Oct 20, 2023
  33. rus

    400/455 auto flywheel same?

    rus, Nov 30, 2021
    Replies:
    19
    Views:
    1,157
    LARRY70GS
    Oct 19, 2023
  34. Stevem

    Seal warning

    Stevem, Oct 18, 2023
    Replies:
    3
    Views:
    243
    Schurkey
    Oct 18, 2023
  35. Al T

    455 to 350 in a '67 Skylark

    Al T, Oct 17, 2023
    Replies:
    7
    Views:
    172
    nekkidhillbilly
    Oct 18, 2023
  36. Weekender

    Serpine belt systems for 455

    Weekender, Sep 23, 2004 ... 6 7 8
    Replies:
    145
    Views:
    23,423
    Hotrodgss1
    Oct 14, 2023
  37. WQ59B

    Header heat vs. PS

    WQ59B, Sep 15, 2023
    Replies:
    6
    Views:
    368
    NZ GS 400
    Oct 12, 2023
  38. VET

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

    VET, Jul 26, 2023 ... 3 4 5
    Replies:
    81
    Views:
    2,298
    VET
    Oct 11, 2023
  39. Al T

    400 Crank and Rod Question. Interchangeability

    Al T, Oct 6, 2023
    Replies:
    4
    Views:
    265
    Al T
    Oct 10, 2023
  40. Canadian GS 350

    Dyno results with the 290-94 H cam

    Canadian GS 350, Oct 8, 2023
    Replies:
    3
    Views:
    463
    Mark Demko
    Oct 10, 2023
  41. rdirks

    Exhaust Advice

    rdirks, Apr 25, 2023 ... 2
    Replies:
    29
    Views:
    1,166
    VET
    Oct 10, 2023
  42. VET

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

    VET, Sep 25, 2023
    Replies:
    19
    Views:
    779
    VET
    Oct 9, 2023
  43. Canadian GS 350

    Break in oil viscosity

    Canadian GS 350, Sep 26, 2023 ... 2
    Replies:
    22
    Views:
    725
    Fox's Den
    Oct 6, 2023
  44. eagleguy

    455 cu 1970 vs 1972

    eagleguy, Oct 2, 2023 ... 2
    Replies:
    26
    Views:
    1,046
    rjay
    Oct 6, 2023
  45. stall1970

    Jahns piston

    stall1970, Sep 27, 2023
    Replies:
    2
    Views:
    231
    VET
    Sep 27, 2023
  46. VET

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

    VET, Sep 11, 2023 ... 2 3 4
    Replies:
    73
    Views:
    2,111
    Mark Demko
    Sep 26, 2023
  47. Frankie70GS

    Header gasket port matching

    Frankie70GS, Sep 20, 2023 ... 2
    Replies:
    21
    Views:
    741
    hugger
    Sep 26, 2023
  48. 12lives

    AC Bracket Trivia

    12lives, Sep 24, 2023
    Replies:
    6
    Views:
    215
    Nearing
    Sep 25, 2023
  49. VET

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

    VET, Aug 29, 2023 ... 2 3
    Replies:
    53
    Views:
    1,281
    VET
    Sep 23, 2023
  50. Canadian GS 350

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

    Canadian GS 350, Sep 20, 2023
    Replies:
    10
    Views:
    539
    Bens99gtp
    Sep 21, 2023
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