2.9/4# what alternator pulley?

89slowgt331

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hey, I am installing a ported eaton with a 2.93 upper/ 4# lower and wanted to know what alternator pulley to get 3.2 or 3.? I know the 3.2 is listed as good for a 2# or 4# lower and the 3.5 is listed for a 6#, but alot of you are running and recommending 3.2 with a stock lower because the alt. is overspun from the factory, so wouldnt the 3.2 put it at factor speed (still overspun), I think I should buy a 3.5 but I dont want to spin it too slow, opinions please?
 

black 10th vert

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I went with the 3.2 based on the consensus back a year, or two ago, but definitely see why you are considering the 3.5". Seems like very sound reasoning you have, but unfortunately I have no personal experience with it. For what it's worth, I kept the 3.2" with my new Whipple swap, even though I went back to the stock lower.
 

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