Steve Mundy's '72 Camaro was one of the most impressive cars we saw: big rear tires, a mammoth big-block, and a loud rumble at idle. Steve bought the ex-racecar online minus the engine. The guys at Ace Machine in Riverside, California, assembled the 564ci Rat, and Westech Performance dyno-tested the engine. When we first arrived to shoot Steve's Camaro he told us he just checked with his insurance company, and we could take the Camaro for a spin around town. One thing we especially liked was the Camaro's license frame that reads "9 seconds on pump gas."

Steve Mundy
'72 Camaro
Specs
Displacement564 ci
BlockDart iron
Bore x Stroke4.530 x 4.375 inches
Compression10.5:1
Rod6.385-inch
Induction
CarburetorHolley 1050-cfm
IntakeEdelbrock Super Victor
Camshaft Specs
Comp Cams solid roller
Valve lift0.742/0.715 inch
Duration@ 0.050 271/280
Lobe separation112
Cylinder heads
AFR 335 rectangular-port aluminum
Valve size2.30/1.88-inch
RockersComp Pro Magnum,1.7:1
Drivetrain
TransmissionPowerglide w/transbrake
ConverterTCI 8-inch
RearendNarrowed 12-bolt
Gears4.30:1 w/spool
Rear rubber
33x19.50 Mickey Thompson Sportman Pro
Numbers
Peak Horsepower839.3 @ 6,300 rpm
Peak Torque773 @ 4,900 rpm

With nearly 2 tons to move, Les Hays wanted to make certain that he would not have a power problem. So he assembled his own 588-inch big-block that converts pump gas into over 800 happy horses. Les's engine develops huge power by flowing lots of air through a set of Air Flow Research cylinder heads that flow 385 cfm measured at 0.600-inch lift. The bumpstick is a very big solid roller. We had a chance to hear the thunder of this motor and can attest that it is awesome.

Les Hays
'56 Chevy
Specs
Displacement588 ci
BlockMerlin block w/splayed billet caps
Bore x Stroke:4.560 x 4.500 inches
Compression10.25:1
Rod6.700-inch, Scat
Induction
CarburetorHolley Dominator 1,050-cfm
IntakeEdelbrock 454R
Camshaft Specs
Comp Cams solid roller
Valve lift0.714/0.714 inch
Duration@ 0.050 266/272
Lobe separation112
Cylinder heads
AFR aluminum 335, CNC-ported
Valve size2.30/1.88-inch
RockersJesel Sportsman, 1.7:1
Drivetrain
TransmissionTH400, Remac Transmission
ConverterContinental 9-inch
Rearend9-inch Bill Thomas Enterprises, Detroit Locker, Strange 33-spline axles
Gears4.56:1
Rear rubber
33x21.50 Mickey Thompson Sportsman Pro
Numbers
Peak Horsepower837 @ 6,500 rpm
Peak Torque773 @ 4,900 rpm