Have fun -- it's your $, however, schneurl-ported 2-strokes are not even remotely like car & truck engines. You just might get a bit more power, but much more likely you will screw up the timing (piston-ported 2-stroke timing is port-dependent -- both crankshaft & cyl ports).

Don't think that I am trying to discourage you -- I like to mess with motors myself (and I've wrecked a few doing so), but you are unlikely to gain anything at all, & will likely reduce the performance. It is generally more beneficial to do exhaust tuning mods & make carefull prop selection choices.

Your motor is seriously under-propped for its airframe application. With a 40 sized standard trainer airframe & a BB .46 engine, you should stay away from 10" props, regardless of pitch -- the disc area is too small for max efficiency. That is probably why you are unsatisfied with its performance -- an APC 11-5 or 11-6 will work wonders. If there is adequate ground clearance, a 12-4 is another good choice.