ok still trying to get this thing started. took it all back apart. checked the cam and crank timing. its ok.. pulled the head off and checked all the valves. none are leaking or sticking. i do have hydraulic lifters. i did prime the lifters when i put them in a few years ago. they are probably leaked down now. i don't think that would prevent it from starting. do these engines have any vacuum during cranking. i have no vacuum at the distributor advance when cranking. going to try a newly rebuilt carb now.