So here is what I've been up to. Welded the rear of the GK back together then mocked up the 600CC F4i engine and thought. I really don't want to die. the Frame is ok on this buggy but 112hp is to much for it. If I could get a Polaris 500 driveline and transmission it would be a different story. So 22 hp with my 7 year old as the passenger is much more manageable.
here is the F4i mocked up with honda civic transmission.
The Civic transmission with the jackshaft setup I was going to run