any one have any idea on how much this hp this engine with make?

509ci 9 to 1 compression ratio
AFR 315cc heads 741 roller cam
Holley dominator carb

647?

582.3 by SWAG.

What exhaust do you have?? I would say mid 600 range with torque out the wazoo!

587.8 would be my guess.

What the F is SWAG?????

I just did a similar build last week but with stock 088 heads and a Holley HP 1000 cfm carb. i used car exhaust on the dyno and made 580 hp and 620 TQ at 5300 RPM

it is custom software for calculating anything at all. very similar to GIGO...(garbage in garbage out...simple wild a$$ guess.)

My guess is a lot more if you get rid of that cam that is all wrong.

585.2