B&S flathead crank compatability?

Hey guys, anyone know if the crankshafts will swap between vertical and horizontal motors? I have a 10hp generator motor with the goofy tapered crank, and I have a 11hp vertical shaft mower motor that needs cylinder work. Think it's possible to take the crank out of the 11hp that has a dtraight keyed shaft, and put it into the 10hp horizontal generator motor? Other than the tapered crank, the 10hp is in great shape, I want to put it on a walk behing tractor.

You would have to look up part numbers for each crank and see if they are the same. Since they are different Hp though im gonna guess they arent.

Part numbers aren't the same even on same hp ratings though I know many parts swap that aren't identical numbers. The numbers is what I checked first though.

Longer rod, makes for a .110 piston pop up. After milling it'll look like a dome piston. 12.5 stroker engine. This will be the 5th one I built. *hint, adjust the timing via flywheel key.
*4 degrees.

This one will go in my Enduro mower. 0 to 60.

1/3 finished with it.

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