Assume we're talking about an AD truck ('47-'55 1st series)? Short answer -- no. The 3804 bed is 9 feet. To make a 3100 bed work and look right, you have to add 3 feet. Notice the 3804 bed sides have 4 stake pockets versus only two for the 6-foot 3100 bed.
Regards, John
~ John
A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult.
1949 Chevrolet 3804 In the Legacy Gallery | In the Gallery Forum 1973 IH 1310 Dump 1963 Kaiser M38A1 2001 International/AmTran RE3000 "Skoolie" 2014 Ford E-350 4x4 (Quigley)