I have a 39 pickup and it has what appears to be a 38 passenger car radiator in it. Every thing fits, but the fan is very close to the bottom of the top tank. If I can find a pickup radiator, I will replace it. I think that a big truck radiator will fit, but the bottom hose connectors are cast iron instead of brass and the angle is different. I have been thinking that maybe the bottom tank of my 38 car radiator might fit the bottom of the big truck radiator and I can make the modification. I would still prefer the correct radiator from the start and not have to jump through a bunch of new hoops.