69 COPO ZL1 427 Camaro.
COPO stood for Central Office Production Order.
Fed Gibb, a Chevy dealer, wanted to be competitive in NHRA Super Stock so he ordered 50 Camaros with 427, all aluminum block (with steel liners) and aluminum heads. The ZL1 427 was designed for the Chaparral Can-Am race cars. 50 were ordered to meet NHRA’s requirement.
The 50 had no consoles or arm rest, both 4 speed or automatics could be ordered. Another 19 were eventually ordered, but they had consoles and armrests.