[smokedchevy]

My horsepower guess was with those heads ported.

Unfortunately, I can't suggest a cam. You need to call a cam company with your cylinder head flow numbers, weight of the car, rear end gears, gears in 1st, 2nd, 3rd, 4th in the tranny, carb size, etc..... The cam you have looks like a good street grind. The heads you have probably cannot handle too much more cam. Your car will run worse and not make that much more power with a bigger cam. It'll sound cool though!!

Rwhite65 makes a good point in that the key is matching everything. The NMRA Factory Stock racers are gettin 330 horses at the rear wheel with stock pieces like cast iron GT40 and Explorer heads. They spend bucks on the dyno tweaking everything though. It wouldn't be cost effective to you to go that route because you're not restrcited in what head you can run. I think you'll be totally blown away with the power if you leave everything else the same and get some good heads. Maybe you can sell those heads and get some other ones.

World products makes some pretty good iron heads that are cheap. You're going to want the Windsor Sr. if you're going for 400 hp. Since you have heads already, maybe you can buy them bare. Summit sells them for around $300 a piece bare. $400 a piece assembled. For around $800, you can have heads that flow 220cfm! You'll be shredding the tires off your stang.