One of the rarest big-block Stingrays was the 454 ZR2 produced in just 1971. Only 12 of these LS6-equipped
cars were produced and they were the last of the fabled Z cars.
The ZR2 was similar in
specification to the race-ready, all-aluminum ZL1 except it used the cast-iron 454 block with the open chamber aluminum cylinder
heads, but still retained solid lifters and four-bolt main bearings.
A complete package, the
ZR2 also used the J50/56 power heavy duty brakes, F41 heavy duty suspension, M22 “Rock-Crusher” 4-speed manual
transmission, a dual plate clutch, stabilizer bars and a heavy duty aluminum radiator, all of which are shared with the race-ready