hey snop thanx, im not a pro but i think i have a good handle on doing a fairly clean job, the results with the porting i am doing have been excellent, definately seat of the pants difference, i just need to learn a lot more to go deeper into port timings and blowdown, but like i said, the results have been very good, not a high hp drag port, but it defineately wakes the motor up. thanx again, if anyone wants to dedicate any more information it would be greatly appreciated. i have 2 more sets of cylinders i will experiment with later on after reading and getting more knowledge. i am also going to make a call to cc specialties