Good morn Steve,
Your 145 (Margot) looks fine, I would not worry about comparing it with others that might or might not have been.
I'm a bit confused about the storage and insurance at the moment. Perhaps I've missed something, but I got the impression your new garage is not finished yet - and that the 145 is stored under cover somewhere fairly locally. In that case why would you be thinking of moving it this month? If that is the plan don't do it (that is my humble opinion)!
A 50 year old motor car will not survive winters being left uncovered - this isn't at all like a modern one. I'd say don't be hasty: leave Margot where it is until you have the new garage complete or Easter - whichever comes sooner.
I hope I have misunderstood something and you have a plan to keep your nice 50 year old motor car under cover - at least for the winter months.
Yours aye,
