David
After further inspection I decided not to attempt trying to remove the flaps, it looks like they have to be removed from the engine bay which involves removing the heater box etc. and then removing a panel above the firewall; this just wouldn’t have been worth the effort involved.
On the plus side, once the cables were removed and a liberal amount of WD40 applied and a bit of force to free the flaps, followed by 3in1 oil with a ptfe additive, the flaps now work perfectly.
The foam sealing material doesn’t look in bad condition either, so I may leave that as it is.
I also decided to follow you by replacing my single ventilation lever with a double lever which I have purchased as new/old stock from eBay, like yours it comes off an Austin 1100/1300
Thanks once again for your advice.
Brian
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