Not gonna happen. If you can get it with the head on i will be impressed. I've heard it can be done so I tried it and I don't see how it will work. You will crush your h/g trying to get the oil pump on if you don't pull the head.i got a s14 waterpump, and i would prefer to do it with the head on. so lead me the way Paul!! thanks for your help guys and anyone else who has their 2 cents im all ears....