[Cammer-6]

After contact from OP I suggested he post in the race section.
I have the cutter to machine the top of guides and if memory serves me well the guides are for 11/32 stems
there are a couple seals that work
the rubber with teflon insert and the all teflon one with stainless clamp.
both fit the intakes as a replacement to factory rubber ones.
I would use the steel umbrella hats on both intake and exhaust.
Is the tube in the oil galley present and has it been checked?
Since this problem is so unique I cant help but think the head or block is cracked.

Here are some pics out of the 67 service manual.
I suggest anyone dealing with the OHC-6 get a copy.
It has lots of good info in it that the other years dont.




Many years ago I ran a group buy of reprinted manuals
perhaps its time again to do this.

EDIT: every one of the pics need rotation,perhaps a mod can fix it. I dont see any way to rotate from here