pmsl 95% of the car is the same the only differences are in the wiring (again mostly the same) the seats (rest of interior is the same) and of course the engine but most of thats the same as a 3i
Anyway back to the question about the gearboxes... Id just use cheap boxes if your giving it PUREEE abuse then of course it will break but what wont? anywho it takes no time to change a box (assuming you dont have A.B.S )