I have a new Tower .75 on my Bobcat also. Using 11-8 Pusher and am very happy with performance. Running it slightly rich on the ground, level, its a pusher so you need to run it little richer than normal for cooling. Remember with the tank forward of the engine it should richen slightly in the climbs and lean out in the dive. Mine also has Robart spring-air retracts and flaps.
Hope this helps,
Matty