interchangeable engine parts?

[yankeeboy]

i was wondering what parts are interchangeable, between a full 6m6 sj engine and a 61x blaster engine. mostly concerned about the flywheel, flywheel cover, stator, starter, reed cages, and electrics . thanks

[yankeeboy]

oke doke, thank you.

[yankeeboy]

i have another question. I got a 726cc engine, what head should i run on it? can i run a 701cc head? or do i need to get it machined/get a bigger one? would a 6m6 (701cc) head fit? thanks