Q: please advise...thanks...
A: That could be interesting! eBay have a lot of Eaton M45's from the 1.8 Mini Coopers, you could try one with a smaller pulley to increase boost. Running at about 8psi with an intercooler, you should see about 50% power and torque increase, with good reliability. I would also add a couple of heater matrixes, one inside each front wing, to take the strain off the cooling system.