[iamchappy]

Why wrap around the header, couldn't you simply mount ducting over the top
of the header. the reflective heat and radiant heat should be enough for heating up the interior enough to stay warm. I am considering this on my 6 as I currently have no heat, since I would not drive it in the winter and only need it when the temps are around freezing this fall, it wouldn't take much to do the job.
I have always thought the stock 914 heat exchangers heating system was to hot, I was always trying to adjust the fresh air with the heat in order to keep my face from frying off.
But what do I know about cold I live in Minnesota and have driven a 914 through many winters. I could never understand it when people said the heaters in a 914 barely worked, I never found that to be true.