I have everything between me and gokart in a checklist now, I made it though a small portion of that list today.
I mounted up the rear trans support cut the old brackets to fit the new transmission and tack welded them in place. This is where i ran into a problem that i am still scratching my head on how to fix. The bolts that need to go though the bracket and trans are now blocked by the square tube that runs down, I think my only option is to cut the square tube, weld in a smaller tube that fits inside and then drill a bolt hole though. This would allow the metal thats in the way to be removed, bolt put in, then reattached.