stay away from the underdrive crank pully they arent exactly balanced correctly which can lead to premature wear on your main bearings. Damn Im been drinking too much tonight and cant remember exactly what it is its not just the balancing about it but somethign insdie the crank pully. Ahh hell just believe me its bad for the motor. Ill remember more when I git sober. I need to saty off the internet when Ive been drinking just gets me in trouble.
Robster