I had major problems with over heating on my 499 stroker in th 67 GTS, after having my original recored. I called U.S. Radiator and told them my problem and he told me that brass was better than alum so I ordered one, he asked if I wanted desert cooler or optima I told him I wanted the best he made don't remember price big was real pricey. It wasn't any better than the original, money wasted. Ordered a new Griffin from Summit but it kept getting backordered back in 2004. Time was running out to get ready to go to Cruisin Coast so salesman told me I might try one of Summit's universal auminum crossflow that was on sale for $138, put it in and problem solved. Wish I had done that to start with. Been in since 2004