Dan ,dose it start easy?did you double check your points .020 did the valves get checked ,did you check the clearance on your exhaust valve by rotating the engine back wards,a must,because if you don,t you will be up on the c/r and it will not be adjusted right .,dose it put out blue smoke? did you do a compression check .by rotating in back words ?should be 100 psi .did you re torque the head ,after warm and cool down .is your spark plug set at .035 ,did you go through the carb ,,this is some of the things i would look at ,.hope this helps . David