i need some help in choosing some after market heads ihave 350 30 over flat tops extreme energy cam 477 480 lift 224 231 duration@50 air gap intake holly 650 double pump carb icurrently have a set of 462 heads on it now but have no assy hloes also what kind of horse power would you think this combo would make thanks  

i see that my post has been viewed quite bit any help on selecting some heads would really be helpful thanks  

I am a fan of Trick flow heads for a budget-oriented build. Air flow Research and Dart are probably the best brands around, but of course then are the most expensive.

If power isn't enough of a concern for you to spend $1000 then you can look into the factory vortecs or a similiar vortec-based iron aftermarket head, such as the RHS vortec or the Engine Quest vortec.