Well some things to consider here Firedood these were not GEAR DRIVE they were done as a stock bolt in cam with cam tensioners. So you give up a few ponies, and if Zippers decides to release them they will be available either way to make the consumer happy. The seat of the pants feel was remarkably noticable in normal driving ranges and what I felt was displayed on the dyno. I am not sure if I will test the gear drive side of this that is yet to be determined, but it would be an interesting test. I think they are going to do that with Dawgs bike, but I am not certain there either.
Only thing I will say is 97 / 98 ft Tq is attainable at 2700 rpm. These tests were done with the Air Cleaner and cover in place using SAE and the dyno guy sitting on the bike (Approx 225 lbs) for the dyno tune using a Race Tuner version 4.51.
There was NO headwork done this was simple bolt in with Screaming Chicken push rods and gasket kit.
I do not know if they will be happy with the outcome I just sent Zippers the last dyno sheet and await their response.
-harry