should get you there cause you dont have to do the diff cause the standard diff can handle the torque from the CA. keep in mind that getting a front cut engine will save some costs because you can use the hyraulic clutch assemblie, radiator ect ect. the costs that arnt taken into account are things like a K&N filter($100) flush the radiator if needed - shock inserts, scheme and balance flywheel, new suspension bushes, custom swaybar(whiteline in sydney does them $250) ect ect. then breaks, R31 fuel tank and pump, new fuel lines lists endless!! we budgeted for 6 thousand. hope this helps. based on a ute conversion. what car its it?