The gearbox should fit , the only issue would be the spigot bearing , might need to have the crankshaft machined to allow the bearing to fit , and also it depends on which box you have in there if it is going to be strong enough , which depends on the state of tune that you are aiming for . I would go the EFI turbo route just cos it makes the instalation easier, with probably a T2 as your weight will be low .