When you get the radiator out post more pics of it. Looks interesting.

I got it out already. I'll take some pictures tomorrow. Be forewarned, it's a good example of why I need to learn how to slow down and pay attention. It's probably gonna need to be re-cored after the utterly stupid way I removed the electric fan my dad and I (read- Dad) put on as a bandaid for the overheating years ago.

(Admittedly I was planning on having it recored anyway- I realize the timing and carb not being set right is probably a large part of why it overheated even before the cam and lifters started going away, but if I can add a little insurance I'd sure like to. That, or an aluminum one I'll just paint black, since a quick Google shows recoring a brass/copper rad is actually just as, if not more, expensive these days)

If you decide to recore, Superior in Mt Clemens is as good as it gets.

Tony
Your absolutely correct Superior has done many radiators for me and never had any issues!

Do y'all have a basic price range I can expect from Superior? Just curious, be nice to already have that in my back pocket, y'know

(I have this intense dislike of making phone calls, too. Call it being a part of Gen Z I guess- I can talk in person, I can text all day, but I do not like calling people/places)

Quick question- is there anything specific I'm looking for on the rad as far as pictures? Other than the HARRISON lettering I didn't see any stampings on it. It's got the internal trans cooler so it's been swapped since to the best of my knowledge (including the clutch pedal still in it) the car was originally a 4 speed.

Harrison Radiator...
 

Assuming it is a factory big block unit...each tank will have a 2 letter code which will indicate application. If the tag is intact, that will offer more info. There will also be a letter code on the larger tank which indicates the month of production.

You can learn more here; http://www.camaros.org/coolingsystems.shtml

-wilma

I don't know why I didn't think to check CRG. D'oh! Will report back with any findings.

Tags are long gone.

Also, is this the right fan for a big block car? It's 7 blades but to my uninformed eye they look awful short. Maybe smaller= faster, I don't know.

Radiator and fan blade...
 

That fan blade is not a Chevy item as far as I know. The 68 BB had a short water pump and depending on HP rating or options like A/C you could have a fixed 4 blade or a clutch fan with 5 blades. The 4 blade fan would require a spacer to position it properly inside the shroud.

This info is well presented on the CRG page I sent you. Of course, you can adapt to fit your needs...more horsepower usually increases the need for proper cooling system components.

-wilma