Buy a set of 110+ heads or have yours worked
Have the heads worked, put on a 58 mm SE Throttle body due to no one else has FBW yet, put on a K&N or other similiar air cleaner that is reusable. (do not recommend HD Filter they fall apart)
Move your badges from your stock heads to the new heads so they say 110
Have your head builder match your cam / style of riding to the new heads
MasterTune / dyno tune bike
Custom Pistons or HD's Mahle 10.5 to 1 pistons
Adjustable pushrods S&S
Lifters S&S
Can use your juggs or get Axtels
If over 600 lift cam put in Roller Rockers
Aim v92T pressure clutch (Lockout)
Exhaust is going to be your stumbling point for a little bit. Personally remove the Catalytic Converters, put in a 2 inch baffle from Full Sac and wait and see what other options avail themselves in pipes over the next 6 months etc.
From there I know that the 110 is capable of putting out 128/122 at 10.5 to 1 compression. You could go higher in compression and gain more, but that should be enough to play with your buddies.
Good luck and look forward to hearing what you end up doing and how it turns out.
Some builders to talk to:
Wes @ Cycle Rama AMP on site = Pam of Cycle Rama Pinellas Park, Florida
TR @ Tman Performance North Carolina
John Sachs member here Ft. Lauderdale Florida
Dave Mackie of Mackie Engineering California
Dan Baisley of Baisley performance Oregon
Dewey's Heads also a member
Regie @ R&R Vermont
Scott @ Hillside NY
SBC ---> Charlie (Arizona)