I believe if the second letter in the Vin Number is a "B", it is a workhorse. Not sure for Ford or any other manufacture. I'm surprised it does not say by the door on a decal, 3270W (Workhorse) or 3270F (Ford). But I do know you can tell buy the Vin Number. There is a thread here on how to read those Vin Numbers and what each letter and number stand for.
As far as a p30 or P32? X2 on legrandnorm post. The Vin Identification will say also. Mine had a identification card above the drivers seat. I guess you do not have one, but I can tell you the Vin Identification will give you a lot of information. My guess, it would be a P32 just based on the year, but that is not fact. Look at the wheels. The Vin will also give you the size engine and type of transmission. Might try this thread http://www.irv2.com/forums/f59/vin-n...ion-54074.html