The engine I found is from RR services with gearbox. As I am still trying to work out if I can balance the books to make it work I have yet to purchase any of it. The sumb I have been offered is good, but with having to buy a diesel engine and pay someone to switch them round, the price would be getting close to being simpler to buy either a diesel sumb or a different mv ready to go. I guess the problem is that I would be looking to use the vehicle for work and so has to be viable to drive 5/6 days a week.
Thank you for all the information and advice, I will get there in the end as am sold on the idea of swapping the double cab for a mv.
Matt