In the English language the word Tuning generally refers to mechanical refinement relating to engine/gearbox and running gear to get better performance. The link you supplied with the photos would be generally considered customising or body modification with no real gain for performance.
With respect to Morgans they have been tuned and undergone mechanical tuning in many forms over the past 80 years if you look into it. In fact fully modified racing traditional Morgans tend to have the wood frame replaced with a tubular birdcage type frame to increase strength and chassis rigidity, and then the body fitted over. A more conservative approach is generally taken with respect to customising a Morgan, after all it is a wonderful classic profile cosmetically already, so why spoil it!
Hi Adrian , sorry for my language mistake

, mechanically i have see several heavy job, but not so many in term of cosmetics , where i think can have lot of subtile change to be made.