A belated welcome to the forum. As for the wheels, others will be more expert than me and it would be good if they could comment. In the photo it looks like you have 16" stainless steel wheels with 205 tyres? The black spoke wheels and the classic alloy wheels are 15" rims with 195 tyres (or also 205 but slightly different offset?) as fas as I remember. Therefore, it is possible that a roadster that originally had the 15" aluminium or spoke wheels was built with narrower wings. I don't want to be a killjoy, but I would like to point this out so that there is no disappointment afterwards if the wheels are too far inboard, or you use spacers, or I am wrong at all.
Enjoy your new to you very nice Morgan!