Rear axle in a 57 with a 6 cylinder

[Ed Hawkins]

I am in southern Maine. I moved a couple cars to storage put this car in my shop lifted the frame and moved the body up off the frame 4 inches. I removed the hood grill and support pieces took the seats out and some odds and ends. Most of the car was disassembled and thrown back together to sell. No glass except a broken windshield I have been looking gray tinted glass as long as it is not too dark. I have a 370:1 rear gear and a drain plug in the housing and a fill plug in the center section. I will disassemble later to put new bearing's and seals this winter. I did buy a second car but it is in pretty good shape so I will not strip it for parts. The big issue is no steering box. Does anybody know if a Mercury box is the same?