Hey guys,
I have a couple spare chevy inline heads in my shop. I'm wondering if they are worth holding onto for a future performance build-up or if you guys have any info on these. Are they all the same valve and chamber size?
Casting numbers:
331184
3847990
I have a 292 with a 3927763 head currently on it. I am planning to build it up as a street motor with 3x1 intake, headers or a split manifold, with a mild cam. Would there be any advantage to swapping either of the above heads onto the 292? Does anyone have any info on the -763 head? Same chamber size & valve size? The 763 has the smog ports in the head, where the above heads do not. Do these smog ports have any effect on airflow, or is it a non-issue?
Thanks!