Quote:
Originally Posted by badass350
Does anybody know where to get a third member posi for a 1939 Pontiac
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Pretty sure that doesn't exist. The first Posi (Safe T Track) was in late 50's on the bigger 9.3 57-64 Pont/Olds rear. You will need a whole different rear axle for that car to get one. Easier to build a GM 8.5 10 bolt , 8.8 Ford or old style 9" Ford , there maybe a 9" Ford housing somewhere for sale already the right size to fit.
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