John, Not sure what the difference is between non-A/C and A/C but here is who I used for my non-A/C G: Dean and Dave AArrow Radiator & Exhaust Work 614-876-6146 Work 614-876-3083 7286 Hayden Run Road Amlin, OH 43002 USA They are the definitive "old-time shop". I remember that they had to special order the core, then they asked for the fibre glass heater box (on the firewall) so they could match the inlet/outlets correctly. Hope this helps some. Richard Osborne >>> "John J. Hertog" <crossram@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx> 11/26/06 2:13 PM >>> Subject: 1961 Chrysler 300G with air conditioning Current affliction: verified leaky heater core Question: how and where to get heater core repaired or replaced? My old-timer radiator shop guy tells me new cores are totally not available for the air conditioning version. The one in this car is quite rotten. So - what do I do? who to talk to? who will make me another one? someone been there done that? HELP! John Hertog in sunny Sag Harbor but leaking coolant [Non-text portions of this message have been removed]