UD pulley for my lt1
i've been running the mac(not sure if they sell it anymore) crank pulley for 7 years... havent had any charging problems, im even running an electric water pump.(the lights do dim at idle).
if you got a big stereo you might want to think about getting the alternator pulley also.
the balancer ones are nice since your not actually adding another pulley to the crank... your just replacing one.(no extra weight)
i dont see them mention anything about those being undrive though... i would ask before you order them.









