..It sure has been a while...
I finished up a little scrambler out of that cm400, ended up blowing the engine (primary chain) and found a cm450 with 1200 original miles on it, swap meet for a few parts and a plethora of new components I'm riding and ready to get back to work on the CB750.
Between a few local celebrities on here, got my new head in! I found that the original head that came with my bike had a very armature attempt at porting and they had dremeled through the intake so that needed to be replaced. Spoke with a friend who was able to track this down, I'll let everyone guess who was involved with this one, I am certainly impressed!