Shaun, the GRP I sent you is the standard race version so the tuning will be very easy. The turboed cranks are more sensative to tune and pipe selection but work very very well when figured out. As far as break in, preheat the engine to about 180-200 degrees as Bob mentioned and let her rip. I looked at the breakin bible at the top of the threads and it looks like something I would follow so stick to that and you should have really good luck with it.