Can't help you with the clutch setup but I mounted my dual M/C's with brake balance bar using my stock pedals.
All I did was study the engineering drawings from this:
and produced my own version. I then built a bellcrank system (1 bellcrank) that used the stock brake pushrod.
I found a suitable place to mount the assembly (behind the beam, under the gastank), linked up the bellcrank to the stock brake pushrod and plumbed the brake lines.
I have incredible braking, am able to adjust my bias depending on how full the fuel tank is, and it all looks stock ... except for the blue bias dial with red sticker peeking up from just under the dash
and I didn't have to cut 1 peice of sheetmetal.
Sandeep