Ok so I tried to see if the engine would move me from dead stop unassisted using longer jackshaft connected to a solo CC and the CC simply twisted the jackshaft out of true and the primary chain jumped off the gears. The u-bolts from Home Depot ain't gonna cut it. The 420 chain is way too big as well. The seat tube was partially crushed by the u-bolts so I cut down the original seat post and hammered it into the seat tube. No more partially crushed seat tube.
Also lowered the engine as far as possible and centered it so the pedals would
clear with a CC installed.
Total distance traveled before chain jumped overboard because of jackshaft twist: About 6"