In Denmark we use http://www.smallblock.dk. There, I could not find the solution to my problem, then I found this website. By searching on your great forum, I found the solution to my problems with rear heater - the problem was due vaacum hoses that were leaking. Thanks!
![Ya winkles :yawinkle:](./images/smilies/icon_winkle.gif)
Sincerely
Jørgen