Callumb
Member
Go to Ashcroft transmissions' website - there is much knowledge there - they can supply you a kit for fitting an R380 to a series, and also to a V8, including bellhousing.
The critical thing is to position the gearbox correctly - you mount the engine later!
it will be about 5 inches further forward than the 4 cylinder unit.
Wow some great stuff on that site. I see they do high ratio kits for the series 3 box.. also a strengthened internal gear set for a 380 - be ideal if they made a similar kit for a series 3 box!