26 inch radiator

[mopar jack]

Shoooter you might be right on the c body rad. The  22 inch in my car now came from a 70 chrysler 330 and I only had to adjust the two lower bolt holes.

[Solarguy]

I have a 26" US Radiator 4 row with factory shroud and it keeps my 340 cool even during August heat here in S Florida.  I have had it for about 10 years.  Only issue was the top strap where it solders to the tank broke twice.  Once under warranty and they reimbursed me to have it repaired and once I just soldered it back myself. 

Overall I am very happy with it's performance.  I can idle for 15/20 minutes at a drawbridge opening and closing in noon time heat and traffic in the middle of August with no problem. It holds about a gallon more coolant which is a lot of extra cooling capacity Plus it has kinda stock looking tanks.  If I had a show car, I'd buy a Glen Ray in a minute but for my cruiser that I want to keep mostly stock looking, it was a good price alternative.