RE: How fast is the savage with the truckzilla conversion?!?!?!
The other issue is, let's say you find a workable 21-22 tooth CB, and get the delrin 48 tooth spur... Now Viz gets the same combo for his Sirio. One of them will have a hell of a lot more top end, the one with all of the RPMs obviously.
Unfortunately you are limited on the Savage gear selection, but even if you were not, that kind of "tall" gearing is incredibly hard on the drive-train with a stock motor (thats why they say 18cb is for on-road only), much less one that makes 400,000x more torque!