hey there tec, welcome to the garage! got any pics of the truck available? we all like pics!! maybe you've sent some in for the gallery? I'm particularly fond of the task force trucks
my read of the factory assy manual sez there's one rad # for all the various 3000 series trucks, and another # for the 4&6000 trucks, tho' the diff isn't immediately obvious in the pics
yer best bet is to take the old rad to a good shop and get it recored, if the tanks aren't frapped, otherwise ya hafta find one from the right series
Bill