1973 Ferrari "400" GTC/4-help required

This 1973 GTC/4 was supplied new by Mike Salmon, then of Maranello Concessionaires, in metallic pale Green with Beige hide with Green tartan inserts to the seats.Around 1974/5 it passed into the ownership of Mrs Barbara Campbell-Golding,its third owner, who previously had owned a 250 GT Lusso.Mrs Campbell-Golding owned this car until the early 1990's, during which time she had it repainted "her" dark Green, and following an engine problem ,Maranello Concessionaires supplied and fitted a brand new carburettor 400 engine-thus gaining an additional 20 bhp in the process.I guess rather like having a 575 engine in place of your damaged 550 engine today!Not strictly original but in the spirit.Since Mrs C-G sold the car it has been professionally repainted Silver Grey and re-trimmed with Black hide and Grey Wilton carpets.I am trying to trace its later history.If anyone can add any details or ideally some photographs showing the car in its various colour changes, I would be most appreciative