Are 1978 non AC heater cores expensive because there is no demand or is there something unique about them? Or - are they not expensive everywhere and LMC truck is not the only place that sells them?

I'm using a 1978 d150 heater core in a non AC box that I want to put in my 79 w150 cab that had an AC system. I plan to have the heater core pressure tested but wanted to have a contingency plan if it is shot.

Also, how hard would it be to convert the box to take a different style heater core?

Thank you!

 

Maybe try Rockauto... I got ya started but I dunno the engine so you have to fill in those blanks.

https://www.rockauto.com/en/catalog/...78,d150+pickup

 

Yep, 5.9 = engine - Rockauto doesn't stock them though . . . thanks for the tip

 

Last on I got was a "Four Seasons" unit.... It is now part of the SMP people... >>>> https://www.4s.com/en
If not try Murray Climate stuff.

 

I ended up checking everything out and Four Seasons does have a part number though none of their distributors carry it. As far as I can tell the only place to purchase a new one is actually LMC.

I ended up having a small leak in the tank of one I pulled from a parts truck repaired and went with that.

Thanks for all of the advice!