Your Tandem sounds like the one I had. I recently sold this 1954 Chevrolet 5400 series COE 16000lb. gvw 2 ton truck, that had a Trucktor Chaindrive Tandem Conversion. The rear tandems were on a separate frame rail that was slid over the factory frame. It went all the way under the cab. See it here, http://www.classiccoe.com/friends/spanky/1954%20Chevrolet5400-1a.jpg


Spanky Hardy
Collector Of Fine Old G.M. COE Trucks & Antique Holmes Wreckers

1948 Chevrolet 5700 COE Holmes HD W35 Wrecker
In the Stovebolt Gallery
More pictures on Photobucket

1950 GMC 250 1-Ton
In the Stovebolt Gallery