... or your rod and main bearings!!!

69 thru 76K's heads and jugs will work. 69's and early '70's - engine# CB750E-1026144 - have one less bolt around the timing chain area - usable but worth some money to restorers.

77-78 K and F's I dont know if the oiling changes to them will affect the mixture of heads, blocks and jugs

Not sure if 75 and 76 F's have the same oiling changes as the 77-78's.

I'm old enough to know better.... yeah right, like that's ever gonna happen