I talked to Rick at PA-PERFORMANCE and he recommended leaving his pulley on as it was about the same size as my MAC pulley. He said you gain very little, if any, hp from the alt pulley - most of the hp gains come from the crank and water pump pullies. He also mentioned that if you take his pulley off and put another on - it'll void the life-time warranty on the alt.
Install on the PA-PERFORMANCE alt was pretty easy, you may have to do a little filing on the alt bracket - as the housing on the 3G 130-amp alts are a little bigger. Are you planning on upgrading to 4g wire on the output side?
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