Your putting a 300x on a 2002?.....1.87 gears? I would do the 1.6230p signature 4 blade (ET drag cut style) is a very good prop on an xb2002. Lots of bow lift, responsive, an top end.
I have a 225 promax with 2:1 gears on now. Next the 300x with 1.87 gears is going on it.
Sounds interesting, I've been thinking about making some light weight chassis for 3.0s and putting one on my xtb21..I will when I retire it from drag racing.