Indy EZ, talks the talk, walks the walk.

EZ's are properly a maxwedge port, so you're better off with that for 512 cubes, especially if you have them ported. Frankly, I wouldn't buy heads without budgeting for porting to some degree. These TFS heads might be the first, since they come CNC finished. I suppose we'll see what experienced engine builders say, as regards how much is left on the table OOTB vs having them ported further. S/F....Ken M