Hey listen i will give u the small run down, basically i have got a RB26 crank and rods for my engine rebuild and also 86.5 Ross forged pistons, i got a GTR intake plenum, gtr fuel rail, gtr injectors, gtr reg and pump, N1 oil pump, HKS 1.6mm headgasket and 256 cams. Now basically my question is, am i going to be able to put all this together and still run the motor on the standard RB25DET computer?? The reason i ask this is because i dont really have the money at the moment for an aftermarket computer so all i want to do is drive it round, not wanting to make any power on it or anything i just want it to be driveable and do no damage to the engine, i will have to run the motor in for awhile so im not going to stuff anything up in a hurry, since the compression will be altered via the crank, cams, headgasket and machining the combustion chamber in the head i believe this will affect the computers way of controlling things a fair bit??/ ANYONE have ANY ideas?