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Old May 30th, 2020, 03:38 PM
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jmfurgason jmfurgason is offline
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Join Date: Dec 2019
Location: Las Cruces NM
Truck: 1963 GMC 1000 sm420 305E lwb wideside
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Default Re: SM420 and 44Axel

Thanks Steve, dont think my 63 has posi so should be fine with Valvoline 80w90 in tranny & diff. jf
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