here is what i have done, i use sunoco gt110 fuel maxima castor 927 oil at a 50 to1 mix, new piston with 3 moto's on it since last head gasket, new wrist pin, i always check ring end gap gap was .012 on both rings, new wrist pin bearing and thrust washers every top end. i did check my head on my counter top witch is granite. it did wobble slightly thou ?? not sure, used a 320 grit with breakaway oil for lube and lightly rubbed it down without the dome, dome was flat did slight rub and no witness marks or being warped, head differant story. but still have a over heating problem or even just thought of it fuel bowl is running out, i am using zilla fuel petcock with the 5/16 fuel hose and 38 airstriker. on long hard pulls 3 and 4 ok but when i get into 5th it starts fallin on its face like i grabbed the rear brake, thought i was having brake problems at first, so got new caliper, caliper mount, rotor and ss brake line and rebuilt master with no help to the problem. to where either getting to hot or running out of fuel. i guess once i get it back together i should look into a coolant temp gauge to see actually how hot it is getting, the pipe is purple and blue all the way to the stinger. i do know i bought a 18 cc dome for the head but someone told me they had to cut the dome to get the right squish, so the cc now ?? i will find that out soon. thanks for everyones help.