Thanks both, yes that would certainly help out and I think I'm going to need all the help I can muster! I've not decided yet but when you consider the refurb cost plus limited choice of 14 inch tyres I think moving them on wouldn't be a bad idea.
Simon, limited choice of 14" rubber ? There are Continental, Michelin, Dunlop, Firestone, Kumho, Toyo, Avon CR6ZZ to name but a few, all in & around 185 x 70 x 14".
185 / 70's are a good modern compromise for what was in period, not too low a sidewall, (which also looks ridiculous), and more than wide enough to retain the famed Alfa dynamism on 51/2" to 7" rims
I put 185 x 70 x 14" Conti's on my 7 x 14" GTA wheels on the last GTA Rep, and they were superb, also had them last year on my BMW NK 2000 Ti.
I don't hold with this "lack of good tyres" business for 14" rims. As long as you're not going racing, there's plenty of top make, good fast road tyres out there in 14". I've always thought it was a ploy by a certain outfit to sell 15" wheels.
I also think 15" wheels don't look right on a Bertone Coupe., with one exception, the TZ / TI Super 5.5 x 15" , but only on the early low-arch cars.
Best looking in my opinion are either 7" X 14" GTA, or the lovely Momo's that you have.
I think you'll struggle , or be very lucky to get the big money for those lovely Momo's, shipping is expensive and a pain, and the price of a repo set means your market is extremely small, but good luck if you decide to !
BTW, you stole that car. Absolute sheds are going for way more than that. Also, that original metallic olive green is beautiful in the flesh, and very rare !