I've been checking on radiators for my 1998 dodge 2500 4x4. It seems that most replacements are single core. Is that what it came with and is it better to go with the three core that I have also found?

 

Does ur truck do a lot vof work if so three core is the way to go

 

I'd go with the biggest one I could find. Anything less and you limit the performance of your truck. For a daily driver it isn't that big of a deal, but the one time you try to go pull a heavy trailer and overheat, you'll be cursing yourself for buying that crappy little radiator instead of the pricier three-core.