Thoughts on Cooling a Stock 383 HP Barracuda/Dart.

Keep this in mind, I'm SURE it happened to me. OldmanMopar posted this originally. He says that over the years the FINS can 'crack away" from the TUBES. This creates a rad that may flow all kinds of water without actually radiating much heat. Rad guy told me the stock 273 --'67 rad was "fine." (Clean and flowed well) Would not cool a 360 on the highway. I swapped in an "unknown" slant six rad. Same basic rad, just newer style, IE, old round 67 tank vs newer 73 tank. Same 2 core. No other changes, engine temp DRAMATICALLY dropped.

On a side note, if you Google something like "evaluating radiator cooling performance" you'll find that this IS actually "rocket science!!"