Do I leave as found and keep it with power steering or do I match the Marti and return it to manual? How does this affect the value ?
As a "driver", power steering might be a desirable add-on. My special order 69 Sportsroof (San Jose, May 69), 351W, 4v, 4sp, did not have power steering and I had no problems in either towing (a dune buggy) or "rat racing" (up some of the roads in the Santa Cruz Mountains).
As a car being shown and depending on class, I would be inclined to deduct points for - not as original (I'm a purist).
Jim