On the trim tag second row it reads: TR Z 792
what does this mean? I havent seen a Z 792 before..

I *think* it means black with saddle accents, and the Z means Custom Interior

See www.nastyz28.com :

"1971 Z87 Custom Interior - Includes deluxe seat (with cloth or vinyl seats) and sidewall trim; cloth seats; glove compartment light and additional instrument cluster lighting; wood grained accents on instrument cluster, steering wheel and door trim panels; luggage compartment mat plus special engine compartment, hood and interior insulation ."

I've seen the "Z" in front of the trim code before, but only on Norwood Z28's (coincidence?), some were standard interior codes, some custom interior codes. Never seen it on a '71 yet, and never heard any valid explanation other than "a mistake". - Dale