67 Cuda: disappointing dyno numbers, need some advice!

Brandt Fonda said

Ill try to have the compression numbers on Friday

maybe one of you guys could get a close guess of compression ratio with 360la block bored .30 stock stroke, 308 heads with I think 73cc ?

I did a compression ratio chart online and got 10.33:1
values I used:
bore size: 4.07 stroke: 3.58 Gasket bore diameter: 4.18
compressed gasket thickness: .039 combustion chamber: 73cc
0 for piston dome and piston deck height.

Click to expand...

A 360 bored .030" over would be 4.03" bore, also flat-tops always have a little bit of "dish" volume due to the valve reliefs typically 7-10ish cc. I also highly doubt your pistons come up exactly to zero deck.

It kind of sounds like the OP is intending to have a shop do all the checking and parts-swapping? This kind of situation is why I do all my own engine stuff... Pulling apart an old-school pushrod V8 and measuring things yourself is not hard. I'd at least do that and then once you know what you have take it to a shop for assembly if you feel the need. You're really shooting blind trying to get hop-up parts when you don't know for sure what is currently inside your engine.

And I agree, those HP/Tq numbers are pretty accurate for the combo you have now, I'd drive it and enjoy it until you're ready to have the car inoperable for a month plus (could be less if you know what you're doing and get it done quick).