how much hp

got a 402w in my 69mach1 just done last yr never had it dynoed yet wondering how much hp i have, some specs, 402windsor with ford motorsports block, cast steel crank, H-beam rods, probe pistons yeiling around 9.8.1, roush200 heads cast iron flowing 263@.600 lift, 1.6 rockers, comp cam HR 288-293-236-242-555-576-108, vic jr manifold, 750HP, 1\3\4 supercomps, seems pretty fast but i dont think im near 500hp which i want, any help?.

Those heads are holding you back.

Ya need some AFR205's on that thing.

AFR205's would do. So would TFS TW R or others. Heck, my exh. flow is higher than your intake. But anyway, 500hp would be no problem with essentially nothing more than a good set of heads.

My dad did the same and he is running about 450 hp.

I have not visited this site in a long time, its changed a lot.
What hapened no Chevys only Fords, Im confused. Its smaller for shure no diffrent area to post, it seems the whole site has been down sized.