Super Jet if a 61x has a 64x head is it bored to 760

[samurai615]

hey guys i found another ski that im kida interested in. the guy didnt build it so i dont know all the specifics on it . it has a 61x bottom end 61x cylinders and 64x head. the guy thinks it was bored to 760 but hes not for sure. my question is would a 64x head fit on a stock 61x cylinder? what would be the advantage of this?? i can tell the top end has been off but cant tell whats inside?? any help would be great

 

[#ZERO]

would a 64x head fit on a stock 61x cylinder? what would be the advantage of this?

Yes it will fit and the advantage would be uneven compression and dual cooling.

If you want to know the bore size you might be able to read the markings on top of the pistons through the spark plug hole using a small inspection light.

 

[Matt_E]

Just because someone put a 760 head on there doesn't mean it's now a 760. I't a very good possibility, though.
The pistons may say 64X on the crown.