Yes heard they are pretty strong. I was looking for one and the seem to come in about £2kish
From what I know I think you will need prop, correct ratio rear diff and drive shafts and possibly the rear hubs
A 6 speed from a uk car should actually go straight on with your standard diff according to a few things I have read.
I would ceheck this for definate though.
I think I will be going PPG as people complain you are always changing gear as the gears are shorter due to it being a 6 speed.
Also I can't resist the sound of a straight cut box.