Best Heads For A 302

I guess it all depends on what else you're doing to the car and what you're using it for. With your current mods quite frankly, I'd keep the Edelbrocks and replace the stock intake with something better.

Heads alone aren't going to set the world on fire. A set of Trick Flow Twist Wedge, or AFR 185's would be good for another 15-20hp over your current Edelbrocks the way the car sits right now, but could be good for over twice that if you upgrade the intake manifold from the stock one to go along with it.

Your Edelbrocks are better than any out of the box iron GT40 heads (ported or not) and they're about equivalent to a set of GT40X aluminum castings.