Re: 4:56 or 4:88's Big Chevy ?
I made the same change last year when I went from a manual to an auto trans. I had a 5.0 gear and went to a 4.56 along with a radial tire, and that gave me the same trap rpm. If your happy with going through at 6600 I'd go with a 56 or a 33. Good luck
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