755 will have a 4 cylinder turbo engine and the loader will be more of an older style with the arms formed as a truss. All of the smaller Ford's of that vintage had straight arm loaders.
I forget now just where they stamped the TLB serial numbers. Often they had an information tag under the hood or on the dash inside the right door... Under the rad cap access door was another place for the info tag... or around the battery box...
You should find some stampings to ID the engine on most likely it's right hand pan rail of the block, mabey date codes on the upper right front mounting ear of the block. Tractors always had their serial numbers stamped on the transmission housing directly to the rear of the starter... though that could be different on this. Those are some places to look anyway.