Z CAR
In Camaro folklore, ZL1 has special meaning. First conceived back in the 1969 model year, it signified Central Office Production Order (COPO) 9560 which allowed General Motors to stuff a monster, all-aluminium 427 cubic inch big-block V8 into its new pony car, creating an instant muscle era legend. Although rated at 430 horsepower, the actual output was around 500hp.
When you figure that the aluminium 427 lump weighed about the same as a small-block
