I prepared last year these already mentioned 2 videos of the rear suspension of my 3.7 morgan and put them on youtube ("Winfried Flugsang", morgan 3.7 rear suspension)
The reason for the first video was, that I had some problems with the car when driving fast (I was used my 4/4 only) and I wanted to know what is going on in my back. So I was shocked about the movements of the rear suspension when I saw the video. After installation of two anti-tramp bars, a panhard rod, brake reaction bars and AVOs I prepared the second video, which underlines my driving feeling: I feel now much safer and comfortable. For me personnaly the 3.7 needs these improvements, if you really want to use the potential of the very powerful 3.7 engine.
By the way for me the "performance improvement" would be to make a training course for sports diver before I would do anything with the engine. But this is for me only.
Axel.