Back to the oringinal point which I think was not really answered well. If you want to convert to electric there is one system I can heartilly recommend:
A Kyosho Magnetic Mayhem reverse
Master Airscrew 3:1 gear box
Master Airscrew 12x8 folding prop
Castle Creations 35 amp ESC
8 cell pack of 1400 AE
Just can't go wrong with that combo, well maybe with the prop on backwards
Whatever you do; have fun
Grant