As far as the 1969 RS side of it goes --- the differences are many - the RS variations from the "standard body" include:
different outer fenders, different inner fenders, different grille, hideaway headlights (based on vacuum actuated, articulating, headlight mounting bracket to rotate the headlight covers in and back in the open position), inner and outer headlight door covers, vacuum cannisters, mounting brackets for the vacuum cannisters, vacuum reservoir, relay valve and the associated vacuum lines, different headlight switch with vacuum hose connections, different windshield wiper switch (2 dentent positions, first detent routes water to the windshield washer nozzles, second detent routes water to the headlight washer nozzles which spray water on the headlights), headlight washer nozzles, diverter valve on the windshield washer pump, water tubing from the diverter valve to the headlight washers, and even a difference in the front header panel to accomodate the headlight washers themselves, bracket that holds the windshield washer bottle - it is physically different on a RS and is located on the passenger side. And this doesn't include the Style Trim RPO items that are a part of RPO Z22, the RS package.
