Jim's has a 120, 131, and a 135 as well.
Geezer, the things you need to be concerned with are Exhaust would recommend the D&D borezilla with quiet baffle and a falsie. Upgraded Clutch would consider the new scorpion that works with hydraulic clutch and has the vpc built in, 55mm HPI Throttlebody which uses the electronics on the 50mm you have now, you just send the complete throttlebody to HPI or if you plan in the future to go bigger, buy the Harley 58mm send it to HPI and have them put on the larger manifold on it with the 5.3 injectors.
Beyond that is a tuning device and tune.