you can use the puma gearbox and take the gradle from under the box of the mk3 that gives you mounting for the gearbox and also allows the engine to be lined up correctly you will need to fabricate a front engine mount which is simple that's your engine mounted you then strip down the loom to leave only engine management on the loom this is the most involved part of the conversion!! once that's done splice it into the original loom and away you go .oh you will also need the fuel tank from the puma and mod it to fit which is handy too