You will have tons of power and will fly great....I would change to metal grips...the stock plastic ones are not good for the power of a 50.

The upgrade kit as longer boom, blades, and diff. gear ratio....but if you calculate the ratio to the engine rpm...the stock 30 gears will work fine...go for it and let us know how it turned out. (I'm considerig doing the same thing, no kit..just engine and mount, and grips)