how much horsepower & torque should i expect from my motor...030 440 six pack pistons lunati flat tappet hydraulic 240/250 @050 520/547 cam 452 with standard valves rebuilt with valve job flow maybe 230 rpm intake 750 proform carb 1 3/4 headers full msd ignition ..cranking comression was 145lbs...

Some where around 400 hp at the crank?

should make an easy 400, I'd think it would like more carb on the big end but the Proform 750 main body actually flows like 823... should run pretty good.

I would think more like 425~450.

Good solid combo, would make right at 500 with some good 270+ cfm flowing heads and a bigger carb. A good 3400 stall 9.5" or 10" vert would be just about right. Invest in a set of Eddies (about as cheap as very good porting anymore) and there's maybe 60-70 hp for the taking.

Had that cam in a 451 stroker with self ported big valve 452's. my Duster ran high 6's in the 1/8th and a 3800 stall Fairbanks (remember those?) vert. That cam is easily a match for the old MP 509 with broader torque and higher RPM potential. Like I said, give it enough Head flow to work with and It'll pull really hard.

i would say 377 hp @ flywheel

Id guess 425. I bet you could put in a smaller cam and not give up anything on average hp.

I would agree that it can make between 425 and 450 depending on the tune. Good luck , Ron