Here is the newest dilemma. I got the head off and found my 2 low compression cylinders intake full of carbon which should be why it was spitting fuel back up through the carb at around 3000RPM. The intake valves must have not been closing all the way to let this happen. I got an inside mic from work and my friend and i took several seperate readings. We got between 3.609 - 3.611. We measured at the bottom of the cyl (as far down as i could reach), mid way down, and about 1/16 of an inch from the top where the piston stopped and got mostly 3.611 most of the time. I also measured in both directions and it doesnt seem out of round at all. the haynes manual says stock cyl bore should be 3.59 and i have 3.611, dif .021. I do see some slight cross hatching left in the cylinders and found out someone already did the BSE kit. Where should i go from here guys? Rebuild or just put the new clearwater (mech valve) head on?