After you check out your heater core, if you are still looking for peace of mind with a larger radiator core then visit some local radiator shops - I've had thicker cores installed into the OEM tanks on non-Dodge cars with good results. It's best to drive the vehicle to the shop so they can see what they'll be working with and to see if fans and shrouds will have fitment issues. If a shop says they can fit a bigger core, you can remove the radiator yourself and drop it off to save labor costs. In most cases I've not needed a larger core unless the engine was modified for much greater output and I live in an area where summer temps will be 90 to 100+ F. My old '86 GLHS never ran excessively hot even while idling in staging lanes at the drags on a hot day.Hello,
It could be the core. Never good heat. It's a 94. Skinny little radiator. I'd sure feel better with a thicker one.
If the fins in the Rad are OK, I would suggested cleaning the inside of the cooling system before throwing parts at the issue.I pulled the air-conditioning condenser out from in front of the radiator. That should help.