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Re: 1971 GMC C2500 rear end questions
I have the same setup 350/th350 and 4.11 dana 60. Yes at 70 it is over 3000 rpm, probably closer to 3300. I put a 4 speed OD automatic (2004r) in and could not be more happy. Still have all the bottom end and cruises at 2000 on the hwy.
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Terry
1970 Custom Camper/C20 , GM Crate 350/7004R, Dana 60, factory AC
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