Hello , I hope you can help with some radiator info and ID. Is the radiator I have is correct for my 1958 Viking 4400 and is there a thicker core available from the larger models of same year that will fit the same? Would anyone have one of these available or a photo to ID, not much available here in Australia for these With Cummins 6bt conversion, not confident this 3' core will dissipate the heat in hot climate. Thanks for your help