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Old 07-02-2015, 01:10 AM   #105
tjsblazer
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Join Date: Oct 2009
Location: Great White North
Posts: 1,520
Re: tjs 72 Blazer Build

Quote:
Originally Posted by CUSTOM/10 View Post
Hey Jeff !

I just read through your engine build thread and your engine is similar to mine. 383, 89 roller block, cam is similar for low end torque, but I used worked over GM cast iron vortec heads.

As I was reading through the build I was on the edge of my seat until you finally showed a picture that had the block casting numbers ( 638 ). I say this because the next engine block after this casting was 880. It was use for the same applications, but the cylinder bores were about 3/8 of an inch shorter and are not good for a long stroked 383. The pistons come out of the bottom of the bores too much and cause a nasty rattle.

Glad you used the 638 block !!!

Gary
Gary. Glad you enjoyed the thread. I'm going to chalk that up to dumb luck as I wouldn't have known. I did have a very knowledgeable friend helping me out so he might have.
Cheers.
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Jeff.

'72 Blazer K5

"Camshaft opinions are like belly buttons; everyone has one and no two are alike"

My Blazer Build:
http://67-72chevytrucks.com/vboard/s...d.php?t=626752

My Engine Build:
http://67-72chevytrucks.com/vboard/s...d.php?t=637336
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