383 rebuild - kinda whimpy on the dyno?

are you sure your builder cut your heads from a stock 93 or so cc's to 79?
Would that much require cutting your intake and maybe shimming your rocker shafts?
i'm wondering about your compression...are you going to check it?

I’m wondering about the 79cc and compression as well. When I dry-fitted the Intake, I was fully expecting fitment problems, but there were none. I should have looked into it at the time.

I’ve torn the bottom end apart now... going after the main seal leak before looking further into tests, etc. could be a little while. I’m also tearing my deck apart to replace boards. Could be I have too many projects to do any one of them perfectly.

Thanks again for all the feedback and advice. Priceless info guys... that’s why I’m a paid member.