Well well, yesterday i took the heads to my machinist and had them maged,and guess what, they are junk, four cracks in one and the other has three. I have always bought new heads and rods, pistons, cranks because of this very reason, i was just tring to save money on a low buget build and it turned and bit me in the ass, Word to the wise, never buy used part that you can't hold in your hand and really check them out good!!