http://www.flex-a-lite.com/auto/html/mojave-heater.html I have this in a 46 GMC pick-up, works well. Hope link works, if not go to Flexalite site.
I have the Vintage Air "Heat Only" unit. I like that you can defrost with it, but the fan is awfully noisy, and there is no way to run it on "Heat" without the fan.
Thanks guys I'd like to find an old heater that would work,or I thought about just getting a heater core and a fan put it in a box and make one.
64-72 or so Ford pickup heaters work great, all self contained on inside of firewall, bolts on with 3 studs....get the switch out of the dash, it's 3 speeds, easy defrost hookup to.
just put a heater core in my 63 chevy pick up .Check them out 3 bolts to fire wall motor and core all in small unit under dash .you could have it in in a real short time with not a lot of effort.