I started assembling my Z50 project motor and it didn't take long at all to realize the the new piston wasn't gonna work. Its a 79 bottom end, and a 79 piston with an 84 head. The piston is hitting the head. I was told that this configuration would work without a hitch. Now i'm getting fed up with mixing and matching parts. The 79 head and 84 head appear to be identical. The piston is from www.dratv.com Who has some insight on this one?? The piston seems to be sticking out like 2-3mm's too far. that seems like far too much to shave off the top of the piston. Stacking gaskets seems pretty ghetto? WHAT TO DO??