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Old 10-29-2019, 10:04 PM
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Default Strange Place For The Thrust Bearing

A guy I know, is working on a '72 TA for a customer. I went and looked at it a few weeks ago just out of curiosity. They already knew it had the wrong heads but we also found that it had a SR block. Well the engine got removed so the correct 7F6 heads could be installed. I went back down to check out the short block and check the VIN on the transmission and this is what I found. I never cease to be amazed at the stupid stuff people can do.
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  #2  
Old 10-29-2019, 10:16 PM
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"If it fits, it ships!"
I have seen that as well. Funny, they can run a long time that way.

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Old 10-29-2019, 10:59 PM
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Any chance you might know what the SR number is on the block?

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Old 10-30-2019, 07:40 AM
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Holly crap!
Are those indeed factory Moraine 400 series main Bearings in those main journals, as that's not a factory timing chain?

Any port in a storm I guess! That is when parts need to get off the assembly line and into the replacement parts stream!

I guess there was vastly different levels of quality control and scrutiny with low production number motors.

Well atleast the customer/ owner got a correct replacement 4 bolt main block like he should have if indeed that was assembled like that from day 1.

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Last edited by steve25; 10-30-2019 at 07:49 AM.
  #5  
Old 10-30-2019, 07:59 AM
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The #1 main cap looks like it's not even touching the block on the left side in the first pic. I'm surprised that it held together for any length of time.
I hope they plan on going thru the short block too.

  #6  
Old 10-30-2019, 10:37 AM
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Quote:
Originally Posted by steve v View Post
The #1 main cap looks like it's not even touching the block on the left side in the first pic. I'm surprised that it held together for any length of time.
I hope they plan on going thru the short block too.
I was just going to say the same thing until I saw your reply. Ive seen pistons and rod in backwards but that's a first for me.

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Old 10-30-2019, 12:13 PM
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Also the snout of that Crank looks kinda beat in spots like the Balancer was walking some!

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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!
  #8  
Old 11-24-2019, 11:00 PM
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Quote:
Originally Posted by Rocky Rotella View Post
Any chance you might know what the SR number is on the block?
Here you go.
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  #9  
Old 11-25-2019, 06:54 AM
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Thank you! And I'm assuming this is an otherwise basic 485428 casting?

  #10  
Old 11-25-2019, 09:06 AM
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Quote:
Originally Posted by Rocky Rotella View Post
Thank you! And I'm assuming this is an otherwise basic 485428 casting?
Yes.

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Old 11-25-2019, 01:41 PM
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Thanks for the clarification on the casting number.

With that 1973 cast date, it coincides with the fact that all 485428 SR blocks produced around that time were equipped with 4-bolt main caps. Not that it likely matters from an originality standpoint, but that's probably the original SR block for the particular '72 Trans Am.

  #12  
Old 11-25-2019, 04:40 PM
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I had no idea they numbered the SR blocks.

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