‘71 Pro-Touring Chevelle Engine Specifications & Other Data:


ZZ 540 Technical Information


TBD during break-in dyno runs, AC Performance, Colchester, VT

(Best estimate is between 675-725 HP)


TBD during break-in dyno runs

(Best estimate is over 600 ft. lbs. thru all of the powerband RPM range)



Compression Ratio



GMPP Gen 6 Big Block Chevy, P/N: 10237292 Cast iron - four bolt main caps


Callie’s RaceMaster  4340 Non-Twist 4.250” stroke, internal balance

Connecting Rods

Eagle 3D H-Beam, 4340 with ARP 7/16" bolts

Crankshaft Studs



ARP Main Stud Kit w/washers


SRP Forged Aluminum, Flat Top design, single -3CC eyebrow notch

Piston Rings

Sealed Power, Moly design


Comp Cams Hydraulic Roller SEE CAM CARD

Timing Chain

Cloyes Hex-Adjust Single roller

Cylinder Heads

AFR 335CNC Square Port

Intake Valves

2.300" Stainless Steel

Exhaust Valves

1.88" Stainless Steel

Valve Springs

AFR with matched spring pressures for hydraulic roller camshaft

Rocker Arms

Comp Cams full roller design, Stainless Steel, Std 1.7:1 ratio

Intake Manifold

Aluminum Holley – Fuel Injectors pre-plumbed

Induction System

Holley Commander 950 MPFI Kit w/42 lb./hr. injectors & 1,000 cfm billet throttle body


MSD Pro Billet, Electronically controlled by Holley Commander 950 ECU


Gear Reduction, Mini Starter design by Summit Racing

Water Pump

Stewart Aluminum Pump, included with Vintage Air’s FrontRunner Kit


Valve Lash

Hydraulic Camshaft, on base circle of lobe remove play & add ½ turn of pre-load


Spark Plugs

AFR-recommended Autolite AR3932, .750” reach, 5/8” hex drive, 14MM threads


93 octane pump gas

Ignition Timing

8º BTDC @ 800 RPM
36º Total @5000 RPM

Technical Notes: