tjs 72 Blazer Build

[CUSTOM/10]

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