Hi Alex,
That sounds an interesting set up, the standard 401 set up has the blower mounted by the right hand heat exchanger and is used for demisting only, the 403 has a sliding panel in the air distribution system to allow this air under pressure from the blower to be diverted to the under dash area not just the foot wells. I had considered adding another blower by the left hand heat exchanger with ducting to the under dash area or as there is plenty of room there one of the new compact heaters as used in a lot of kit and classic cars to provide heating.
I think what I need to do first is get the existing blower working and see how well that actually pushes air to the screen.
Another option suggested is to fit heated screens which I must admit I had not considered, John Lawley is going to talk to a potential supplier about this.
Knowing how well these can work on modern cars that and an alternator conversion might be worth considering and leaving the standard heating system unaltered.
Geoff.
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