I talked to an old timer about doin' the top end on my motor ('74 xlch) & he said there was no easy way. So I pulled the motor out 'cause the head/rocker bolts wont clear the top tube.He & the manual both said not to use sealant w/ the rocker gasket. Got it all back together & it wont start. Feels like low compression when I kick it, bit of oil comin out @ rocker cover.Is lack of sealant the prob? What do you use?Any easy way to get the heads off? Pullin the engine out sucks.