thanks for the heads up Denny, I had a fella call me that had a original heater box and core. The blower motor has been changed out to 12 volts. He said that the core was good and did not leak. But after hearing from you and Bill I wasn't going to go back with the original heater. I told him about my concerns with the core not holding up to 14-16 pounds of preasure. So thank you both for the help. I would have wasted 100 bucks and then have to turn around and get a aftermaket heater for the truck anyway. I'm looking at a vintage air heater/defroster setup. I have used the vintage air heater in a kit car I built a few years ago and it worked real well, even when i had the rag top down. Oh well, I wanted to try and use the orignal heater box, but that doesn't seem possible with the engine setup I have now. thanks agian for the help. And if you know anyone that needs a original heater for a 50 chevy truck I know where there is one available.

Last edited by tracern1; 02/07/2012 3:54 AM.