RPO GU2 is 2.73's. Yup just about anything you put in there will help!
3.73's would really wake up that 4.3L.
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Originally Posted by bigdtrucker_35
checked mine in my 1990 1500 4.3l its gu2 whats that? im guessing it high huh?lol what would be a better one a little lower?
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