ZL1 was the legendary regular production option (RPO) code that struck fear into all competitors who faced 1969 Camaros--and a few Corvettes--equipped with this 427-cubic-inch monster from the factory. The price to own an original ZL1 has surpassed the value of some homes, but you can build your own ZL1 powerhouse thanks to Chevrolet Performance. By reintroducing this infamous aluminum big block machined to blueprinted specs, Chevrolet Performance has made it possible for today's mere mortals to experience the ZL1's pure power and tremendous torque.
356-T6M Aluminum BlockTested to 650 HorsepowerStandard Deck Height (9.800'')
4.240'' Finished Bore (4.300'' Maximum Bore, 4.375'' Maximum Stroke)
Steel 4-Bolt Main Caps Splayed 16° on the Three Center Mains
2-Piece Rear Main SealUse Mark IV-type Front Timing Cover
Provision for Hydraulic Roller CamshaftSiamese Cylinder Walls
Centrifugally-spun Cast Iron Cylinder SleevesUse Replacement Sleeve #809-12480035
-AN O-Ring Oil and Water Plugs