I have the same issue with my 230 in the 64'. Part of my problem is due to having a new radiator built with 3 rows instead of the original 2 rows, and efficency coming into play. It's been really cold here(in the teens) and several feet of snow on the ground, so I just cover part of the radiator with some cardboard much as I did when I had the KW. Without it the heater is working overtime to just barely keep frostbite to a minimum.
Tramp
