The tyre size of 165/80r13 has a few possible reasonable alternatives but by far the best would be from a real enthusiast (and bit of a character) of Blockley tyres, plenty of good quality rubber, full 80 profile, period tread look and suitable for road or casual sport use and with a (genuine) 1,000-mile money back guarantee. "if these Blockley tyres are not the best that a customer has driven on, then drive 1,000 or so miles on them and we will refund. Every one of these tyres is inspected and checked for dynamic balance - the small painted yellow circle on the side wall can be aligned with the valve stem by the tyre fitter so they know the optimum place to put it. We perform this additional inspection process as part of supplying the best possible no-compromise product." You just drive them steady for the first thirty miles and then however you like the next 970 miles.
I've no connection with the company and nothing to gain or lose whatever you buy. Blockley were going to be my next tyre purchase on my "classic" before its sudden departure. Modern tyres in these sort of sizes can be disappointing without out the grip or even reasonable wear of the same make and model of tyre only a few years previously. - https://www.blockleytyre.com/product/165hr13
There's a few ugly rim weights on the front wheel, do you know what the manufacture date is on the tyres (four digits, first two are the number week of the year, second two the year, three digits and a triangle on its side they're last century and IIRC pre-1990s three digits only).
For wear of the bottom part of the dissy I was more thinking of plates, bob-weights, and perhaps vacuums units.
I've no memory of what dissy is fitted to the Estelle and some might have been change to other dissys, but for old Lucas you can still get separate NOS vacuum units, springs, weights, plates, bodies, etc., rebuild of existing.
I have heard other good reports about Lumenition electronic ignition units, there are two types, Magnettronic and Optronic, I've had neither of these but have had an Aldon (Pertronix) Ignitor and a NOS earlier BL version of the Lumenition Optronic and both worked well but are now expensive compared to (if available) a fully electronic dissy like CSI or 123-ignition.
If you're going electronic then get rid of the points, otherwise IMO there's little point (pun intended) the more good quality electronics ignition you go to the better as far as I'm concerned, cheap and/or low-quality is a real gamble if you want reliability and not have to carry spares "just in case". The prevention of fit 'n' forget is better.
Such a low mileage car needs a good service, of the whole car, then proper regular use, on reasonable length journeys, not just short test runs, and that will iron out any initial wrinkles and get the car running better. For the engine old cars particularly love clean engine air filter, engine oil & filter change, spark plugs and CB points setting. No point doing too much fiddling with the carb until the engine is reasonably well set as carb setting is end of the set up list and may need redoing if you adjust settings in the list before the carb.
Mk2 Escort would have given you a very reasonable idea of RWD, if you can remember it. You shouldn't really experience the pendulum / fishtail / tankslapper of the rear engine unless you make a mistake, as I once did when not concentrating on what I was doing leaving a dual-carriageway on the exit slip road and suddenly saw a stationary car and over reacted with a sharp right then left turn of the steering wheel, lesson learnt.