Based on the info from Royv I contacted Bill Carberry at Classic Radiator (once you hit the link above you navigate their website to Classic Radiator). He quoted a re-core of the radiator for my 53, retaining the OEM numbers at $595 with a 1 year warranty. I checked with him on recore for the heaters, the fresh air heater is $200-$225, and the re-circulating heater is $395. Pressure test and repair of the fresh air is $30 and up. I will be able to drive mine down to him if I go that way, so no shipping.
Denny,
The if you look at the numbers above you will see that the higher amount is for the round core. Also, as noted, you need to go to the site and navigate at the bottom to Classic Heater and Classic Radiator. main site is
http://www.caparadiator.comMike