I would suggest the following:
V&H DRAK A/C.....probably cheapest A/C that will work as good as the very best most expensive stuff out there and you wont have to bend your leg around to reach the brake pedal!
V&H Fuel Pak......probably cheapest and easiest out there right now.
Option is the venerable DFO as this too is quite easy to use.
Cycle Shack Slip Ons........always an excellent sounding great performance muffler.
You will be able to drop the correct V&H numbers into the fuel pak and ride straight away...............without dyno time.
Try John ............orders@zanottimotor.com
www.zanottimotor.com
Great prices great service...............stay away from those wankers at Wally`s Cycle World or whatever they call themselves now......
Then when it comes time to hot up the motor etc............do a search on hnere cof the thousands of threads put up for engine builds.
All the best, Ozzie.