hi ptitterington
I think you might well be in the wrong section - but I'm not a mod, no doubt one will be along shortly to advise
I want to caution you
VERY STRONGLY against letting any garage, even one which bills itself as a "Minor specialist", do up a car for you without supervision.
If you want to know why I'm cautioning you so strongly then do feel free to PM me.
I would advise you to find a trustworthy member who is local to the garage you choose, to make frequent visits to the car on your behalf, to check on progress and document the restoration.
It's always a good sign if the garage is happy for them to drop in unannounced - and your delegate should do so.
The ciritical points for visits are while the metalwork is being sorted out and while the first coats of paint (primer, stopper, undercoat) are being put on. It's so easy for dents to be filled with huge quantities of filler rather than being properly knocked out and the metal shrunk if need be.
I's also crucially important that every single sign of potential rust on any part of the bodywork, inside and out, and underneath, should be removed and the whole car treated with anti-rust treatment.
If the metalwork and the paintwork is not done properly then you will be faced with a huge bill for remedial work a few years down the line.
As the car you want is a traveller then you also need to make absolutely sure that no corners are cut with the restoration/replacement of the woodwork - it is structural and if it fails the car will fail its MOT.
As far as your question goes: I assume you are getting disc brakes fitted to the front wheels, along with the servo? THere's nothing wrong with the original drum brakes, as long as they are properly maintained and adjusted, but many people prefer discs for modern driving conditions. And you might want to consider one of the new heated front windscreens.
It does rather depend on what you mean by "a showable vehicle". Morris Minor shows have prizes for "Working Minors" as well as for concours vehicles, for example (yours won't be concours if there is anything at all non-standard or in less than perfect, original condition on it). "Judge" can advise you if you do want to do up a car to concours standard.
Good luck!!!!!!
wibble