I know that Brian's HD in Langhorne had a dyno if you wanted to go through a dealer and right down the street from them is Simons who does a lot of bikes. I dealt with Simon's once and they treated me well. Maybe someone else will have more input. Simon's has a website out there somewhere.
I came all the way from Southern MD to have Simons do my 95" kit. Andy Simon is very good with the dyno. He actually pulled the carb, took it apart and bored it out for better airflow while he was dynoing my bike. He tweeks every bit out of your combo. He sold it to Jeff at NAMZ, but stayed on to keep busy. Good folks there.
Tell them Benji fro Southern Maryland recommended them.