You can do it. In 2011, I hauled out a larger engine for our shaft drive bike from Colorado. That sounds simple enough, but it was a different engine both in displacement and physical size, and different main engine mount locations. I brought some "various" steel and my son fabbed up frame brackets, longer engine mounts, etc. We had to seek out enough generator to run the MIG, but it worked out fine (current MPS-PG-650 record).
There are lots of helpful folks out there, or we wouldnt have got it going. I'll be watching for your runs on the internet, this year.
Good luck, ride safe.
JimL