[dsraven]

you may be able to find a dimensional pic online for the AD truck, they have a tapered frame, front to rear, so it wouldn't be a direct fit for sure because the TF trucks have partallel rails. there would be a drawing of the AD frame in a GM assembly manual, they are fairly cheap and available on Ebay or from some of the truck parts places like Brothers or LMC. the AD trucks start to taper around the trans mount area and are narrower in the front.
maybe one of these pics is readable enough for dimensions on the TF truck. the 58-59 frames are a bit longer in front of the front spring hangers to accomodate the longer fenders and also the rad support brackets are slightly further ahead. the rest of the frame on the TF trucks are basically the same from there back.