One of the first things i noted on driving the mgb was the limited rear vision through the small rear view mirror – pretty useless when compared to the vision you get from modern day rear view mirrors.
Simple fix is to fit a clip on wide angle convex mirror over the original and makes a big difference to the view behind.
Only a few £ from eBay and well worth the money for the benefit of safer driving. Also hides the dash cam i have mounted under it.
MGB tips mods and maintenance 