Very hard to give you an accurate judgement not knowing your skill level.... I'm a certified mechanic for 25+ years now so what I would rate it at may not be the same for everyone.
Plain and simple, no special tools required... Very straight foward.. Disassemble, change out the output shaft and reverse the order... If you have decent mileage on it I suggest changing the chain while your in there as well as the shift fork pads.. Here's a link to the instructions that come with a advanced adapters kit.vvv