that fren already converted manual, but now clutch slip already2 points to consider before making a na car into a torque monster:
1st, it is to be made a drag car not for daily driving or else the car will end up in the workshop more often than u be visiting a fuel station. Too much torque and anything exceeding twice the standard torque from the standard engine will kill your suspension especially the drive shaft and bushes.
2nd, it must be with a manual gearbox, too much torque will kill your autobox in no time. In another way of concluding, why not go for an originally sport car if u want it to be a torque monster?
Just my point of view.
Also I don't think we will be getting any turbo charge diesel sport car anytime soon as our current grade of diesel are just not 'clean' enough for it.