Personally, that is a vehicle to maintain, use and enjoy rather than do a "proper" restoration.
The age of registration and little details will never make it a proper S in most peoples eyes. The cost of getting all the details correct (and I'm sure that there will be lots of them when you really look at it) is silly - eg, the instruments.
Make of it what you want - dont worry about the "judges". And be honest if you want to sell it !
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My thoughts exactly.
