Overheating solved 67 Firebird 400
 

My 67 Firebird 400/TH400 factory 3 core radiator would not cool! It would run 190-220 deg. and sometimes hotter regardless of what I did. I installed a Cold-Case #CHC11A aluminum radiator, and all the problems are now solved. This CHC11A has 42 rows of two 1 inch cores. The stock 3 core had 27 rows with 3 - half inch cores. That's 15 more rows with more cooling capacity. The Firebird now runs 165 on the road, and 170-185 in hot Florida traffic. I run a 160 thermostat and a non thermal, 7-blade, 19" clutch fan. I painted the outside perimeter tanks with Eastwood radiator paint to give it the stock look, and left the center cooling fins unpainted for better heat dissipation.

Great news! I run a Cold Case in my 1979 400.

Your previous rad was the ORIGINAL factory radiator? Odds are good it was clogged up, too. I don't care how well maintained it may have been. A 50+ year old part is a 50+ year old part.

How is the fit compared to the original radiator? Any mods needed?

My guess would be it dropped right in. Cold Case seems to have the process down.

I run a replacement Cold Case in my 72 LeMans GT. Perfect, drop in fit. :)