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tino0217 · 11-13-2019, 02:11 AM

I forgot to mention this 350 sb came out of a 86 blazer. I'm not positive but i think this is a 12 bolt 3.73 gear ratio. They said to use this formula 275×.40×2÷28+20=27.857. Does this mean anything to you?

11-13-2019, 02:11 AM	#12
tino0217 Registered User Join Date: May 2017 Location: Seatac, wa Posts: 172	Re: Rpm question I forgot to mention this 350 sb came out of a 86 blazer. I'm not positive but i think this is a 12 bolt 3.73 gear ratio. They said to use this formula 275×.40×2÷28+20=27.857. Does this mean anything to you? Last edited by tino0217; 11-13-2019 at 02:29 AM.