i was working on my old girl (53 chevy 3100)gutted the cab i was wondewring how to tell what heater i have there are no stickers on it and some kind of weired valve that has coolant lines going into it but does not connect to the heater box it has a nob on it that has a arrow that says warmer.im am going to post pics on photobucket.com i cant get pics linked to threads i post for some reason. thanks in advance for the help
