I found some of my old engine building formulas.   I was taught the same concept but different.  we go over this at work with customers wanting shorty drag pipes...they dont realize that it pushes their power band over their red line and they will never see the power.   Even on the dyno with the EGA readings it is such a pain to get it right but with open pipes there is always a dead spot in the lower RPMS

Exhaust Header Length  *L = Pipe Length
Thermal 1st wave: L=(1380 x (180 Degrees + Exhaust Valve Opening)) / RPM Desired.

Sonic 2nd wave:L=950 x (180 degrees + Exhaust Valve Opening)) / RPM Desired

Intake Track tuning with known pipe length:
2nd pulse: (1100x 1/2 Intake cam duration x .96) /RPM =Length

3rd pulse: (1100 x 1/2 Intake cam duration x .705) / RPM = Length

4th pulse: (1100 x 1/2 Intake cam duration x .538) / RPM = Length

So now I am looking up the cam specs and will get back.  Of course I am lazy and a dumb ol Harley technician and would love for someone to check my math.  I am thinking about cherry bombing my exhaust which will pass inspection in WV as an open baffle(must have baffles to pass in WV)  but I am thinking about making a custom intake.  In school the dyno teacher turns off the lights and we started a carberated  bike and shined a flashlight a few inches out of the carb to watch the air fuel mixture...reversion is what it is called.  then we changed all sorts of exhaust and intakes to watch the changes.  Dynos dont lie...people do.

How far from the engine can you place the carb?