which engine ya got jmig?
edit nm didnt realize this was in small block section
for stock to stock swap out, tbi heads or tpi heads will be about the same, may be able to find a set of aluminum heads
you can usually find a set of tbi heads pretty cheap, less than $100/pair and get as much as you want done to them. minimum get em tanked and mag'd replace the seals, you can reuse the valves and springs in most cases, it's cheap to replace but it all adds up