Sure , I know of lots of guys who have built hybrid heads.
They all seemed to have two things in common:
1) They made lots of power.
2) Iron or aluminum, they all were fragile, high maintenance pieces, requiring frequent head removals to fix leaks, cracks, and valvetrain. Add in head gasket sealing issues and you begin to understand the formidable challenges you face. But one man's challenges are another man's motivation.
That is the reason the prominent drag racing teams have switched to one-piece billet aluminum heads.
