I currently have a b16a crx, and was looking for ways to make more power. Somebody suggested putting an ls bottom end, and we actually found a 94 b18c1 for fairly cheap price. The crx is an si, all extra wires have been ran for the b16, and the only code the car has is a tps sensor code. My question is how difficult will it be to put the gsr motor into the crx. I'm planning on using the b16 tranny, and all the wiring thats currently there for the b16, and all the motor mounts should be the same, but being that this was our first swap, it's intimidating. Will I have to run more wires, and also will the pr3 ecu work well with the car, or will I need to change it for something else. I just want to make sure we're not going in over our heads with this, and so any comments or suggestions are greatly appreciated.