I need a new radiator for my 1981 K5. Recently I swapped a 6.2 diesel, TH400 and NP241 in place of 350, TH350 and NP208. I got a diesel radiator with the engine but the element is not in a good shape. It was a 4 row radiator (its possible it had a replacement element). I have been trying to locate a 4 row radiator for my truck but have only found 3 row radiators. Is there some place I can find a 4 row radiators for my diesel? I am not sure I need four row radiator. Is there any need to search for that thing? If not, what is a decent price for a 3 row radiator in US? Thanks, Jon H.