Phil,
£15-20k to spend eh? Well, my precious could do with a few upgrades if you're lost for ideas! :?:
Personally I think you have a superb and unique 911 on your hands which you clearly enjoy. Starting again with a Gen 2 might be appealing but I think I'd find myself constantly comparing it with the mankini green special rather than it being a fresh project in its own right? Just my thought.....
How about a slow burn barn find type project? Wasn't there a thread on 914s recently? Something along those lines whilst keeping that beauty of a car might just scratch the itch?
Anyway, good luck fella with whichever direction you chose. :thumbs:
Oh, by the way, first dibs if you're selling any of the carbon dipped plastic trims....... :bandit: