Here is a good explanation on the COPO 427 added to the front fender extension from the CRG. Also explains the use of Camaro and/or Rally Sport fender badging both of which were used on RS COPO's in 1969.
Adaptation of the Camaro chassis
From the last paragraph
This system also explains why Rally Sport COPO's built through June 69 do not have the rally sport fender emblems (later RS COPOs do have the rally sport fender emblems). The "Camaro SS" badging was initially specified and the document "deducted" the SS, leaving only the "Camaro" emblem on the fender. There was no external indication of the engine. Assembly line workers wrote "427" in crayon on the inside of the fender extensions so the fenders would not be pierced for emblems as all other 8 cylinder Camaros were.
Here is one of mine previously posted. 04C COPO
One thing I have never figure out is what the letter after "427" means, it is not always the same. [img]<<GRAEMLIN_URL>>/dunno.gif[/img]
