Join Date: Jan 2015
Location: Injun Territory, 'Merica!
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The typical tail shaft housing on a 661 case Muncie is the one that only has 3 bosses in a triangular pattern to bolt a stamped steel mtg plate to. The Hurst shifter mounts to this. The earlier alum style mtg plate mounts differently. IF the '661 case Muncie is a mid to late '70 model transmission it should still have the small output shaft & take the same tailshaft housing (with the W bolt pattern) as previous Muncie 4sods.
Linkage rods for '71-74 Muncie 4sods were much beefier than previous linkage rods. The length though ought to be the same as '67-70 Pontiac A-body Muncie 4spd shifter linkage, I have both styles, on my list of things to do when i get my shop organized is take pictures & measure shifter rod lengths.
OEM Chevelle style Hurst 4 sod shifter has an offset to the mechanism where the flat handle bolts on, much like the '69 Camaro Hurst shifter. This Chevelle style shifter could be used in a '68+ GTO, but doubt it will work with a factory console.