adjusting the valves?WHY?
NO NO NO NO! YOU GOT IT ALL WRONG! I know the best way to adjust valves, figured this one out from my favorite pig farmer turned cruiser head, yep, he told me the best way. You just run that old straight six, just like the old 235, it is actually a chevy motor you know, and after it gets good and hot you go ahead and tighten them ther valves down till it starts fumblin' and then you back it off a quarter turn. Who needs those over-priced feel gaugers? Don't worry about bustin' your fingers, unless your valves are so loose you can stick em under there, yeah, they'll break then.
If you have a hard time doing this while it runnin' then you don't have rhythm. That ok, adjust'em while it isn't running with yur feel gauger. If you want to find TDC just pull the spark plug and stick one of them skinny fingers of yours in the hole and when the piston stops smashin' it then you are ready except now you can't get finger out . This is the part where you say stuff you shouldn't and the neighbor's porch light comes on and his dogs start barkin. Back it off and remember where you had it. Adjust the valves with the hand that don't hurt. If you run out of fingers and both hands hurt, stop.. should only have a couple valves left. You should fix the noisiest valves first. Fix the other ones later.
Did I mention not to lean over the fan, hope its not too late. Good luck. Hard to type with all these band aids on.