Re: 1971-1973 Motion Vegas
I didn't find a code on the axle housing.
The casting number is 3917124N GM2DN Date looks like E 21 8.
The axle has big brakes (Truck) and the factory coil spring upper control arm ears.
Edge of flange to edge of flange is 49 1/2 inches.
The tires on it now are N5015s with a full 12 inches of tread under the ZL1 Flairs.
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