Pontiac - Street No question too basic here!

          
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  #21  
Old 12-11-2019, 03:12 PM
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steve25 steve25 is offline
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Being that they are a 400 block bored to only 4.06" they would have to have start off life with .060" thicker Bores and they would not have a special casting as it would make for the need of a transfer lug to notify works go route these such blocks into a different phase of machining if you ask me.

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  #22  
Old 12-11-2019, 03:59 PM
mgarblik mgarblik is offline
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Quote:
Originally Posted by steve25 View Post
Being that they are a 400 block bored to only 4.06" they would have to have start off life with .060" thicker Bores and they would not have a special casting as it would make for the need of a transfer lug to notify works go route these such blocks into a different phase of machining if you ask me.
This block is an interesting piece. Dimitrie Toth might be a good person who could tell you more about Pontiac Foundry practices. Between his father, and his work and experience, he may know exactly how the SR blocks were run. Might want to PM him.

  #23  
Old 04-04-2023, 03:49 PM
GOAZwildcats GOAZwildcats is offline
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Default Service replacement block.

So maybe I picked up the same block in Vegas last week.
It does not have an SR stamp bit the casting has been grounded and stamped 9778785. It also has the same casting date G118.
Std bore 389 with amasteel crank and 76 casting heads build late 64. Most interested thing about this block is the thrust bearing was on 1st main cap.

  #24  
Old 04-04-2023, 04:34 PM
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And I guess the crank is cut for the thrust on number 1 main?

I just looked a 58 370 block and a 1959 first year 389 block and both of them have the thrust on the normal 4th main, so I don’t know what the heck you have there!

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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!

1) 1940s 100% silver 4 cup tea server set.

Two dry rotted 14 x 10 Micky Thompson slicks.

1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.

Education is what your left with once you forget things!

Last edited by steve25; 04-04-2023 at 04:43 PM.
  #25  
Old 04-04-2023, 10:55 PM
GOAZwildcats GOAZwildcats is offline
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The crank has a beautiful wear mark about 1/16 deep on the first counterweight. The motor had a lot of miles and survived okay.

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