Originally Posted by an8sec70cuda


All depends on the end goal, but a pair of 516 heads can be made into very capable high performance heads that make good power.


Not without added costs over buying a core and just rebuilding them. Then you are stuck with iron heads that cost about as much as the Aluminum heads and don't make more HP, not to mention the AL heads still have room to improve if you want to go that route.

Stock rebuilt they are fine. You start porting and such then you have to think hard about how to spend your money.