This rear comes with drum or metric disc brakes and axles installed in the housing. 
 
1955-1957 Chevy
Stock width 60" wheel mounting surface to wheel mounting surface
Perches welded in the stock location
12 Bolt - USA made casting
3" tubes / 1/4" wall - seamless DOM
30 spline Moser Engineering bolt-in style axles
Truetrac posi
Choice of gear ratio
1350 yoke
Aluminum girdle cover
Sealed ball bearings
5 x 4 3/4 bolt pattern 
Torino ends, common 2 1/2" brake offset, 2.771" hub, and access holes
10" Torino drum kit or 11" metric disc brake kit 
Drum brake lines included
14" Braided flex lines installed with disc brakes
Parking brake cables hooked too drum or disc, trim to fit design with clevis
 
12 bolt internals are 12 bolt passenger car spec. Axle bearings are common Ford 88128 found at any part store. 
 
We recommend Lucas 80/90 non-synthetic with no additives with Truetrac differentials. 
 
If you would like to narrow this rear, do a different powdercoat color, use a different bolt pattern, switch to disc brakes, hold the shipment at your local terminal, we can accommodate your needs. Reach out to us and we will get you a custom quote. 
 
You can expect a 5-7 day build time. Powdercoating adds about 1 week to production. 
 
Sales tax only applies to Indiana residents. 
 
Any questions, leave a note or contact us a 260-301-2424.