You're correct, I haven't verified anything unfortunately. I think the problem is that I admittedly know diddly-squat about these details of older vehicles and of course Google doesn't have much info either. It feels like I'm teaching myself rocket science on an actual rocket with a braille manual. LOL
Laser temp gun? No idea what that is.
I think I'm going to just assume that cooling is otherwise as efficient as it can be with the current setup and start with a fixed fan having more blades. Do you happen to know who might sell a direct replacement for the 4 blade?
I *think* I also may have found a factory sized shroud so hopefully those two may be the simplest solution for now.
Thanks guys and sorry for all the questions. My win/loss repair ratio ain't that great at the moment but I just want to "do no harm" to my baby here.
My advice here is to save your $$ until you are SURE your radiator needs replacing. I have one of the best Mopar ever made, a 1965 22 x 17" one meant for Hi Alt-AC-Auto or driving in Hell for that matter. I tried a Cold Case one which is indeed thicker and shorter, about 22 x 16", ran it for 2 years after I saw some leaks pop out on my old one with good cooling, then had to replace the Cold Case after it swiftly rotted out. I had it well grounded to the battery, and a zinc anode in the thing too, but have since been informed that Chinese aluminum simply CAN'T be trusted for long term use. I replaced the Cold Case with a better aluminum radiator made in Chicago, and followed the maker's rigid grounding protocols, with good cooling, but it failed to survive crashing into a late model Infinity, leaving me with naught but my old Mopar one and a light duty 2 row Mopar which I since found is for a /6.
Soo, I had the good old 2524984 rodded out, patched, and painted by a good local shop, and that again cools the same 383 it rolled off the Line in Nov., 1965 with. During the cool season down here, I use only an electric pusher fan with this splendid old copper wonder, though I install an 18 inch clutched 7 blade Mopar fan for the HOT Season, coming here around May usually.
This year: I'll have the fan shroud MADE for this exact radiator from another my my lucky eBay scores! I just stripped, then repainted that in engine enamel. I also got another 2524984 with that shroud. I'm having the same shop rod and seal this one too. I'll NEVER sell these.