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#1
01-30-2026, 01:21 AM
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68 4-door Biscayne L72 on eBay
https://www.ebay.com/itm/13698762316...=10001&mkevt=1
Real?? If so, oh my goodness! Could you get full gauges in a 4-door full size Chevy in 68 ? 3915084 on the transmission part number tag is a number that I have not seen on any published Muncie lists. Skimpy ad text does not say whether it is an M20 or an M21. Axle stamp indicates 3.73 posi rear, so if both are original then whichever ratio it is it is the version with the internal speedo drive gear for a 3.55-4.88 rear. I have seen 3915085 which is a 68 M21 (not sure which internal speedo gear it has - for 3.55-4.88, or for 3.07-3.31).
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Jeff Helms 65 Z16 Survivor 65 Z16 drag car 66 Chevelle L78 unrestored 67 Chevelle L78 unrestored 67 Camaro SS350 Survivor 
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