Engine Mounting Points

Afternoon! I've been riding for 20yrs, mainly Hayabusas, but my true love is small Honda minis. Specifically the NSF, CRF and Z.

I have a 150cc miniGP I'm building and if throwing the whole kitchen sink at this project (MFZ wheels, aluminum replacement parts, making carbon parts when needed, designing 3D parts, full titanium hardware, etc), an engine will need to upgraded knowing I'll be opening a can of worms. To make it more worth the effort, want FI, water cooled and of course the HP gains.... hence why I'm here.

While I feel fairly confident on most of this swap, but before I locate a salvaged bike to pull parts from I'd like to get a better idea to confirm it's feasible to mount in my frame. From pictures, appears to have very similar mounting locations.

My questions is , would anyone have any dimensional info for these engines? Mainly engine mounts and width of the head that in between the frame. I hit up my local Honda to measure one, but they have zero 300s in stock.

Appears the Rebel 300 engine is the same casing as CB/CBR300, just different cam profiles and few HP less. Anyone confirm engine case is the same? I ask because it'd be easier to measure it's engine due to being a cruiser, if I can locate one.

Pics for attention. Was going to make my own exhaust to clear the Ohlins shock prior to seriously considering an engine swap. Muffler is even 3d printed as a place holder while waiting on the real one to come in.

Any help is appreciated!