I have a 69 RS/Z28, it's an early car #8815 from Norwood,OHIO. I have the POP, the cowl tag states the car started down the assembly line on 09B, Sept, second week of 1968. The identification # for the engine is V0905DZ, where I have a problem is with the id #s for the transmission and the rear end which are P9M16 (Muncie, built 69, Sep 16) and BU0919G-E ( 3.73:1 ratio, built Sept 19th by Detroit Gear & Axle) respectively. Should the transmission and rear axle have been built before the build code on the cowl tag? The "White Book" states that the build code on the cowl tag was the date the car started down the assembly line and not when it was built, so I think the protect-o-plate is correct if this the case. Has anyone else encountered this?