I'd like to the purchase the Mac - 801-1301 to fit on a 1971 CB750. I like the Mac - 801-1301 because it has the longer pipe with upsweep after the 4into1 connection. I have removed the passenger brackets from my bike so I believe the clearance is there for this exhaust to work but I'd like to be certain. I assume it's the same connection at the engine but I'm not sure. Anyone have experience with this install? Thanks for the help!