Ive had a 66 chevelle diff in my 64 parisienne, i used the brackets off the 64 and welded them to the housing of the 66 diff. So it can be done with a little work. It also allows for a one piece driveshaft due to the higher pinion.
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pontiax- (canadian pontiac X frame)1964 Parisienne 2dr. Hardtop ,lagoon aqua metallic (Q) ,421 cid Dart Industries block and heads. 550 hp. 575 ft lb of torque.
