Camming ? Maybe go the 4 intake cam route. Those Aussi guys had a fantastic set of adjustable cam gears about 10 years ago, and not slotted B/S but clockable secured gears. Don't know if anyone else has gotten a set or if anyone else still makes them but to me that would be a hot item to have to eek out even more performance - but over 300 Hp ? Yea that's current success, CONGRATULATIONS - worlds most powerful R Model V Rod ?? So -have you picked up your new brass balls yet to try to use all that power without going over backwards mukle ? Great Job !!