I just kinda skimmed over all what was said, but if you need upper mounts just make some.. Motor mounts are my specialty.. lol
Hack up some 8 gauge sheet, and go nuts!
For the one thats offset just stick it in a vice, and bend it around till it looks right. Drill a few holes, and voila!!
Yeah, I hear ya. I could just bend the mounts till they fit, but I'm looking to fix the reason they don't fit. It's either bend the metal here, or bend the metal there. Might as well fix the part that's already wrong. Right now, until I pull the motor and am proven wrong on my theory... here's the plan. I'm going to strap it down on my car trailer, nothing but frame and engine... maybe suspension too. I'm going to ponder on that part. Basically going to turn the trailer into a makeshift frame machine. I will use nearby trees, the come along, and maybe the winch to pull her back into shape until the tabs fit correctly.
Hopefully the end result will be a bike that will be a bike that tracks straight and doesn't wear out parts faster because the frame is all tweaked.
There's a few other places on the frame that somebody laid down some popcorn welds that I need to fix as well as a number of holes I need to clean up the threads on or heli coil as well. It's not going to be a points winner restoration, but I want it to be spec.