anyone here ever solder a radiator? I found an aftermarket modine rad with the correct diemensions for my gremlin, it fits an eagle...everythings the same and the pics looked the same also but were diff numbers. well I got it short so im happy but the mounts are on the wrong side...mine mounts to the rear and the new onemounts to the front...so I need to swap the straps. ive sweat pipe but do you need a special solder? which flux? im not a plumber so this is kinda foreign to me...any helps appreciated