jlroe, If your radiator was manufactured by Behr, and it has a plastic header and side tanks, here is an alternate solution to your ploblem that I used when faced with a similiar situation about four years ago. Seek out an independent radiotor repair shop in your area that replaces the plastic tanks with genuine Behr replacements parts and have them make the repairs. Far less costly and just as effective a repair. Moreover, if your current radiator has a plastic header tank and the upper hose connection does not have a reinforced brass sleeve inside that neck, the Behr replacement header tank hose connection will. If unable to locate a repair shop in your immediate area, check the classified ads in The Star magazine. There are several shops listed that make these repairs if you don't mind a small delay and UPS shipping charges. Hope you find this info usefull.
85 500 SEL, 241,500 mi
90 5.0 Mustang LX conv.