OHH vs OHSK vs OH195...does it interchange?

#1
So I have an OHSK70 which I was intending to convert to a mini bike motor. As I understand, Tecumseh carried the OHSK70 over to the new naming convention in 2004 as the OH195SA.
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Before I go blow a wad of cash on OH195SA parts for an OHSK70, these are the same engine, right? At least some parts should interchange, I hope. I'm in need of a crankshaft (the snowblower one I have has no keyway and I have no resources to give it one, along with a strange shaft size) and there are OH195SA cranks which are MUCH more capable of getting a clutch or TAV.
 
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