I have a rolling 57 frame that I picked up and a 57 shortbox. The question is on the rolling frame because I do not know what cab/bed came off it, would it be safe to believe it is a shortbox frame if they both measure 114" center cap to center cap? Also why does one have a single driveshaft and the other have a two piece?

Use a big enough catapult and even pigs can fly...remember nothing is impossible, impractical yes, but never impossible.