Thanks guys, I've done a few big auto electrical stuff on cars so that's not my main worry atleast for now xD, my main concern was that 20e gearbox not lasting 1year or so, I guess there is alot of varibles on how I drive the car etc. I've done a few decent builds in the past that have blown out of budget by nearly double the original budget. Maybe it's best to for me to hold onto the motor and start collecting parts and also buying the manual conversion and smashing it all in at once.
Cheers for your help