I'm doing a complete restoration on my 89, but I can't seem to find an 89 diesel radiator core support for it as it is a diesel. Anybody know where I can get one? Or how hard it would be to modify it for ac? Thanks

 

LMC has one, at the bottom of page 23 for a diesel, but also says without AC so

Truck Parts and Truck Accessories

 

You could try some of the places that advertise having "southern" truck parts. Also I don't know if the one on LMC will work or not. I want to think there was some talk about it a few months ago. That it may not even exist...