Why would you use a motor like that! It's pristine, and if you check out what it's worth in it's current condition you'd be half way to an Oliver!
They are only a reed valve induction motor of modest power. A nice 09 but not one to build a model for.
That motor with the genuine exhaust would make over $200 on the bay.
I'd look out for one of the Oliver repro cubs, a far better motor!
Cheers JG