While installing a new impeler on my Shogun pump I popped off the dist. cap b/c of a noise I've been hearing around 2500 on up. Its a high pitched metalic noise. I've read info on the 20v list about fixing noisy distribs. by shimming the gear with washers, can this be done with my MC motor? If so what parts do I need and what is the basic procedure? TIA! -Nate '87 5kcstq