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Re: Gear vendor's with 3:54 rear gears and th400?
1700rpm at 55mph isn’t lugging the engine. Just make sure you have load based advance (vacuum) on your distributor and you will be GTG. My stock Tahoe runs 1250 rpm at 55 with 3.73 gears.
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1969 C10 Suburban Custom (Factory 396/TH400, survivor with no rust)
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