Hello, I have a 40's Deluxe Harrison heater Model H-01-46, that I would like to put in my '39 1 1/2 ton Chevy. Could anyone point me in the direction of a wiring diagram or better yet a write up of how to install one of these? I've heard there is supposed to be a shut off valve on the side of the water pump and I know where it mounts on the firewall but thats about all I know. Thanks for the help