Should be just a smidgen over 50" which is the inside width of an AD bed. Add 1/8" for the thickness of the two bed sides, the thickness of two flat washers and two lock washers, and 3 or 4 times the thickness of a nut. You should have a few threads sticking out each end after it's assembled.


Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.