I'd agree and only Mike can say how much grief he gave the 'box to last that long

The turbo car is a bit of an oddity though as the power and torque are way over the design spec for that box - however, the power delivery is probably 'kinder' than a N/A car.
Fully approve of modding a car but I'm not sure what you are planning to achieve by doing the swap - it will last for ever if you toodle about but it wasn't designed for that and will still cost the best part of £10K to get a rough, industrial change and make a crap road car.
MikeT and I had a purpose, albeit very different, Tim is just plain mad. Just make sure that you are going in with your eyes open 'coz the V6 has nowhere near the engineering support that Mini/Escort/Vauxhall hybrid stuff has and we are consigned to one-off costs for everything.