1969 Chevrolet Camaro ZL-1

A GM corporate edict forbade Chevrolet from installing engines larger than 400 cu in (6.6 l). However, two Central Office Production Orders (COPO) 427 cu in V8 engines, numbers 9560 and 9561, were offered from dealers in the 1969 model year of the Chevrolet Camaro. COPO 9561 used the solid lifter L72 big-block engine, making an underrated 425 hp. COPO 9560 used an all-aluminum big-block called the ZL-1 and was designed specifically for drag racing. It was the most powerful engine offered in the 1st generation Chevrolet Camaro (1967-69). Though rated at 430 hp (321 kW) gross, the ZL-1 made 376 SAE Net hp in its "as installed" state. With exhaust changes and some tuning, the horsepower jumped to over 500. Just 69 ZL-1 Camaros were produced. (wikipedia)

(Photos from boldride.com & autowp.ru)

Chevrolet Camaro SS 396 - First Generation (1967-69)

First generation of the Camero. 

The SS performance package consisted of a 350 or 396 cu in V8 engine and chassis upgrades for 
better handling and to deal with the additional power. 
It featured non-functional air inlets on the hood, special striping, and SS badging. 

34,411 units of the SS version were built. 
The L35 396ci V-8 was a late edition, not added to the options list until November 1966. 

An even more powerful L78 396 with 375 horsepower later became available. 

The car’s smooth, coke-bottle styling was such a hit that rival Ford employed a very similar design for the 
European Mark III Cortina sedan, and even Aston Martin adopted cues for its 1970s V-8 super car.

(Photos from autotraderclassics.com)