i was told by a friend of mine that running a KB 1.7 at less than 10# will damage the blower so that it will not last long at all. i was planning on runnning 9# on my stock bottom end. is there any truth in what he is saying?? i dont wanna go too big and blow my engine. but if i cant run less than 10# i'm gonna have to go with another blower. let me know what you guys have done. anyone with a 9# kit and a lot of miles on it???