well the e7 heads are free I have the bits to do the port work. I have a local u pull it for gt40 heads for 100 bucks but every time I have been they are either cracked real bad or already taken off. my local machine shop would charge 550 for a complete redo new springs valve job checking for straightness and cleaning. e7 heads ported with my gt40 ported intake and a decent cam is my new goal