Joined: May 2008
Posts: 10,112
Likes: 2,753
From: Fredericksburg, Va
Bikes: ? Proteous, '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, 'Litespeed Catalyst'94 Burley Duet, 97 Specialized RockHopper, 2010 Langster
I can only think of one exception. The 1973 Bottecchia top of the line models, Professional and Giro d'Itaila, had the same frame, color and except for one model decal the same decal's. The conversion is to replace the group. You can go either up or down with the Professional being at the top. Cost effective? Not unless you already have all the parts. Even then, the sum (complete bike) is not equal to the value of the all the parts independently.