My '75 C10 had an OE Camper Special radiator in it when I bought the truck (less than a year ago). The Camper Special is big...and provides excellent cooling. The rad fit my C10 perfectly. With all the work I've been doing under the hood...I kept springing leaks. Rather than send it in for another repair or recore, I opted to replace the OE with an all aluminum equivalent.....(some people will insist that the OE brass rads are better than the aluminum construction rads....others will argue that the aluminum rads are better.....my radiator guy says its a 50/50 split, depending on how clean you tend to keep your system..........One point that has never been disputed is that the Camper Special radiator is a great rad for the SBC and that the size and fitment is great for our Rounded-Line trucks.)
I just bought a 100% American Made, all Aluminum 4-core, Camper Special equivalent for $280 from my radiator shop here in L.A......it fit like a glove and cools like a champ.