GM Performance Parts 1970 Chevelle - Old Test Mules Never Die

GMPP's ZZ 572 test car has a long-proving ground history with testing GMPP's crate engines, and showcases the latest one with style

Patrick Hill Aug 16, 2006 0 Comment(s)
Sucp_0610_08_z 1970_chevelle_convertible Sitting_with_the_top_down 2/20

To make sure this A-body can stop after unleashing the 572's power, Bill installed a four-wheel disc Stainless Steel Brakes system to increase the big Chevelle's whoa power.

Because the car was being featured on Rides TV, a 90-day deadline was looming over the crew at Washtenaw CC to get the car finished. To their credit, they only went over the deadline by 10 days. Some might balk, but when it comes to car projects, 10 days is nothing, and the quality of work suffered not at all. Every seam, panel, and piece of trim is nearly perfect on the car. The convertible top is a flawless piece of art, operating smoothly and giving the car a good seal against the elements.

Sucp_0610_23_z 1970_chevelle_convertible Trunk 3/20

Right after the Chevelle's completion it went straight to the test track to put the 572 through its paces and see how the newly restored car handled. After a few more tests, the Chevelle traveled to Florida to long haul on the 2006 Hot Rod Power Tour. Through 2,000 miles of constant cruising and 100-degree heat, the car never missed a beat, the ZZ 572 big-block staying cool and happy thanks to a Be Cool aluminum radiator, along with the car's driver and passengers.

Chevelles and Malibus are plentiful, and it might be easy for all those to start blurring together in some hellish A-body Rorschach test. However, this car stands apart from its peers. The combination of subtle style, classic looks, neck-snapping power, and striking paint allows this one to easily stand apart from the crowd.

To see all the great performance parts they have to offer, visit the GM Performance Parts Website

Tech Specs

Car: 1970 Chevelle Convertible (started life as a Malibu)

Trans: 4L85E Automatic w/ overdrive

Rear: GM 12-bolt with Detroit Locker Differential w/ 3.23 gears, DTS axles

Brakes: 4-wheel slotted disc Stainless Steel Brakes system


Front - Global West coilover system w/ 1" drop;

Rear - Stock coil spring with Hotchkiss control arms and swaybar

Wheels: Front - 18 x 9; Rear - 19x10 / Goodyear Eagle F1 Tires

Stereo: Eclipse CD/DVD capable with GPS navigation system

Gauges: GM Performance Parts

Sucp_0610_21_z 1970_chevelle_convertible ZZ_572_crate_engine 4/20

The heart of the GMPP Chevelle is the new ZZ 572 crate engine. With 620 chest-thumping horsepower and 650 lb-ft of tire-shredding torque, this motor will put anything on the moon in a heartbeat. Features include a performance hydraulic roller cam, aluminum heads, and special "572" valve covers.


Displacement: 572 cid

Bore x Stroke: 4.560 x 4.375

Block: Cast iron w/ 4-bolt mains

Crank: Forged steel

Rods: Forged steel - H-beam design

Pistons: Forged aluminum (9.6:1 compression)

Cam: Hydraulic roller; Lift - .632 int./ .632 exh.

Heads: Aluminum rectangular port, 118cc chambers

Valves: Stainless steel - 2.25 Intake / 1.88 Exhaust

Rocker Arms: Aluminum roller design - 1.7 ratio

Intake: Single-plane aluminum

Carb: 850 cfm 4 bbl

Ignition: HEI-type Distributor

Horsepower: 620 @ 5500 rpm

Torque: 650 ft./lbs. @ 4500 rpm




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