Total scratch built Homie. Have to make everything, including the engine.
Design calls for a half a Volkswagon engine. Basically remove the rear two cylinders and cut the crank and cam to save weight. Some folks even saw the case in half.
Depending on bore and stroke you can get anywhere from 30-45 hp @3600 rpm
I had a deal made for a mid 70's type 1 to teardown and modify...but it hasn't materialized as of yet. Still have fingers crossed.
This is the spec sheet. Super simple, not fast, just something to putz around the desert and keep me busy. Since I'm generally broke, the "pay as you go" build plan had a lot of curb appeal