Wanted to take the '70 NADA for a shakedown cruise, but visions of 'what if' and a less than understanding spouse led to taking my MGB to the dance. Of course the spousal unit keeps us entertained with endless selfies on those long boring stretches of highway.
I did 900+ miles in the Rover last year and it cruised it. You couldn't get the top down like in your MG I admit, but your wife would have been a lot more comfortable on the journey. With me it was always a toss up whether I took the Rover or my 260Z and if I asked the wife she always picked the Rover because of its quietness and the comfort levels.