M and N cams are a shim head so not for a lock nut head. I've used 1127 K cams on a few bandits. But That's only because I had a few sets lying around. You be able to use any of the 1052 cams and K and L. Never used any 750 ones so can't comment on weather suitable or not.
Misty eyed? It's probably just the hay fever. But imagine the emotional flood gates opening when said misty eyed codger spies a pristine GS, GSX, slabby of slingy?
Come to think of it, it was the bandit 6 frame that has weedy mounts, when adding an11 or 12 motor. Still a better job sleeving the engine bolt though.
The 12 motor has an M12 bolt, the 750 has an M10 mount. You can drill out the mount to M12. Or you can sleeve the 750's M10 bolt with some 12mm o.d. pipe to get a snug fit on the engine. The latter option means you wont end up with a weakened set of mounts.
Looks nuttier than squirrel shit. Great to see the use of older technology. I built a chop for a fella over the Winter that had a girder front end. Amazed at how well girders actually work.