FYI
https://www.facebook.com/marketplace/item/255415681816908 (https://www.facebook.com/marketplace/item/255415681816908)
1275 sprite engine FS as seen on Facebook marketplace. Longview Tx area.
You can make that work in a Mini without a whole lot of work- I've done it in the past - BUT you need a Mini crankshaft.
I have a new 1275 crank for sale if someone needs one.