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rod · 09-08-2013, 07:30 PM

yes, the Chevy [57-64] posi units were the same as MoPar units, with the exception that the Chevy used 17 spline axles [just less than 1" dia.] and the MoPar posi used the larger 30 spline axles. took 4 gears to complete the swap. back in the day, the backing plates were the major hurdle. today, of course, Moser could whip out a set of much better custom axles using all Chevy parts. and yes light weight. years ago I meet a SS racer from BC,Canada who had a red '56 SS/NA with a 2x4 PG with Brake and he actually went back to the Chevy/MoPar rear. he was not easy on it.
Rod in AZ

09-08-2013, 07:30 PM	#32
rod Member Join Date: Dec 2009 Location: Kingman, NW AZ. in the middle of the longest stretch of Route 66 Posts: 315 Likes: 0 Liked 20 Times in 15 Posts	Re: 1957 150 yes, the Chevy [57-64] posi units were the same as MoPar units, with the exception that the Chevy used 17 spline axles [just less than 1" dia.] and the MoPar posi used the larger 30 spline axles. took 4 gears to complete the swap. back in the day, the backing plates were the major hurdle. today, of course, Moser could whip out a set of much better custom axles using all Chevy parts. and yes light weight. years ago I meet a SS racer from BC,Canada who had a red '56 SS/NA with a 2x4 PG with Brake and he actually went back to the Chevy/MoPar rear. he was not easy on it. Rod in AZ