Not sure about the older ones, but for my '59 6400, since the original was toast, I ended up with a replacement for the 'little' trucks, but one meant for big v8s. Same size, same capacity, basic construction seems to be identical. Only real diff is the fan shroud mounting. Seeing as the fan took a nice chunk out of the shroud as well as the radiator before I got the thing, I'll have to rework that anyway.
Not like I don't still need to track down some sheet metal and wheels before I worry about stuff like that. A 261 somewhere in the state would be neat for that matter.
Funny how I'm reading about a radiator in something 50+ years old having the same problem I'm fixing on the wifes 7 year old car this evening.
