Never heard of a Morgan having a beefed up spring on the driver's side. Seems rather unlikely as drivers' weights vary so much and, as you imply, it would be aesthetically poor. My '82 Plus 8 has an extra leaf each side as it was ordered with a tow bar (which is still in place, nicely chromed). A pair of new springs would sort things out.
Neither did I until the +4 Calgary Owner sent Me some pictures of it on His level garage floor. He did some measuring and found the extra holes at the rear of the LH spring on the chassis. Very strange. I have been trying to get Him interested in "Talk Morgan". He has a T16 +4 and there are only 3 or 4 T16's in North America. He is using Me as a source of information but I know very little (nothing) about a T16 engine etc.
