[El Vikingo Tropical]

At the final I haven’t changed nothing from stock parts rebuilding the engine, I have just rebuilt the with the idea of build an second more hot engine making a coming swap in the future.
As I had everything just mixed up in boxes it’s been like puzzle, driving me crazy..
Nothing was marked as it should have been etc…
But now engine is together and finished but with one little shaft left over ho I can’t find out from where it comes or goes, this driving me crazy!

If anyone knows anything about this shaft please help!