Not sure if I'll use an original type or adapt something maybe bigger for the diesel, but I read here at one time that the f350 radiator was bigger than the f100 and 250. Mine didn't come with a rad in it so I used one from a landcruiser for the 223 as a temp. PO did toss one on the bed for me but he wasnt sure where it was from and it's separated bad form the tanks. The radiator I need would have the bottom neck on the left side. Are the v8s on the left? I might hit some junkyards off island on Wed, so maybe I can make some calls tomorrow if I get some info. Thanks, GB