From the Reference Section:
- Street Cam Selection Guide
- Buick 455 O.E. Camshafts
- High 10's Secrets for Your Buick 455
- 400/430/455 Poston Cams Grinds and Numbers
- 400/430/455 Kenne-Bell Cams Grinds and Numbers
- Buick 455 Drag Strip Tests from Kenne-Bell
    - Buick 400, 430, 455 Engine Specifications
- Buick Staging Chart
- Differences Between 1970-71 And 1972 and Later Type Block
- Head Flow Chart
- Cam Button
Results 1 to 4 of 4

Thread: 430 heads on 455 block

  1. #1
    Join Date
    Jan 2018
    Location
    Tehran, Ir
    Posts
    17
    My Feedback

    (0% Positive Feedback)
    Rep Power
    0

    430 heads on 455 block

    Hi everyone,

    I have found very good condition heads casting number 1377979 on 430 engine, on BBB casting numbers : https://www.teambuick.com/forums/vie...bers_big_block , says that this casting number is for 400, 430, 455 engines. So please anyone can help me on following questions:

    Can I use them on my 1974 455 engine with 455 rocker arms and lifers etc.? I guess I must Block the oil passages on heads.

    Can I use standard 455 head gasket for this heads?

    Can I use 455 stage 1 valves on this heads?

    and at the end what will be my compression ratio with this modifications with 1974 pistons?

  2. #2
    Join Date
    Apr 2004
    Posts
    4,772
    My Feedback

    (0% Positive Feedback)
    Rep Power
    0
    part of the compression loss in 1974 is due to the deep piston dishes, so you're not going to get all the way to 10:1 CR.

    i know Yardley did an old head onto 455 conversion back in the day, but i think he used the 430 rockers. which caused issues, because the 430 and 455 use different diameter pushrods.

    http://1badriv.com/

    yes, you should be able to use Stage 1 valves. the primary problem with big valves in the 430 / 400 was shrouding.

    yes, it would be good practice to block all extraneous oil passages. you should compare your heads to the block deck and gaskets just to be sure. this page says you shouldn't use the steel shim gasket for an old head onto an oval water passage block.

    http://www.buickperformanceclub.com/idblock.htm
    The way to crush the bourgeoisie is to grind them between the millstones of taxation and inflation.
    Vladimir Lenin

    Government schooling is about "the perfect organization of the hive."
    H.H. Goddard, Human Efficiency (1920)

  3. #3
    Join Date
    Jan 2018
    Location
    Tehran, Ir
    Posts
    17
    My Feedback

    (0% Positive Feedback)
    Rep Power
    0
    I will change pistons to KB 1730H for better specs,

    But I want to use stock 455 rockers and pushrods and don`t know if with this system my pushrods size will be fine or not?

    Also I don`t know if can I use 455 intake on those heads, maybe with small changes or not?

  4. #4
    Join Date
    Oct 2018
    Location
    Sweden
    Posts
    1
    My Feedback

    (0% Positive Feedback)
    Rep Power
    0
    You have to use a 430 intake.
    some aftermarket intakes fits both 430 and 455.

Similar Threads

  1. '70 heads on a '75 block
    By memphiz_balla in forum Big Block: 400, 430, 455
    Replies: 4
    Last Post: 01-01-2013, 07:01 PM
  2. 455 block with 430 heads
    By Mr.Green in forum Big Block: 400, 430, 455
    Replies: 2
    Last Post: 05-15-2012, 01:22 PM
  3. Will 231 heads fit on a 252 block??
    By bbatka in forum Small Block 215, 300, 340 (and Rover V-8)
    Replies: 4
    Last Post: 11-19-2010, 01:34 AM
  4. 75 455 Block and 430 Heads
    By macnjac in forum Big Block: 400, 430, 455
    Replies: 1
    Last Post: 12-24-2007, 06:23 PM
  5. aluminium big block heads
    By rcull in forum Big Block: 400, 430, 455
    Replies: 7
    Last Post: 03-25-2007, 05:48 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
TeamBuick.com Privacy Policy