1969 Chevrolet COPO Camaro ZL1 427 vs 1971 Plymouth Duster 340. Pure Stock Muscle Car Drag Race (FAST factory stock)
First car is a 1969 Chevy COPO Camaro ZL1 with a 427 V8, and the other is a 1971 Plymouth Duster 340 with a 340 V8. The ZL1 Camaro has a 4-speed manual, while the Duster 340 has a 727 3-speed automatic. The ZL1 still retains the factory 4.10 gear set, but the Duster 340 has been upgraded to a 4.30 set. Their weight is somewhat similar, make sure to watch the video for more details. It is of note that the COPO is in fact a real deal #9561 car that came from the factory with an all iron 427 rated 425 horsepower (450 by the NHRA), but the owner wanted to preserve the numbers matching engine so it was pulled. In its place is an engine from a COPO order #9560 car...that being an all aluminum ZL1 engine rated, "430 horsepower," but true output is likely over 500 horsepower. However, tires are a limiting factor, and horsepower/torque only matter if you can get it to the pavement. The Duster's 340 was rated 275 horsepower, but probably made more along the lines of 300. However, this specific Duster 340 is an all out Pure Stock build (note the heater hose delete), and I suspect it's truly making in upwards of 400 net horsepower. Both great cars!

Remember, both cars participate in the Pure Stock Muscle Car Drag Race series, so please check out their website: https://www.psmcdr.com
Also make sure you find them out on Facebook.

The rules for PSMCDR are listed below:

For 1955 to 1979 musclecars built in United States and Canadian assembly plants with a minimum warranty of 12 months and 12,000 miles.
Any car running faster than 11.50 will be disqualified and will not have a qualifying time recorded.
Any convertible running faster than 13.50 will be disqualified and will not have a qualifying time recorded.
Casting numbers must be correct for the year and horsepower claimed including intake manifold, heads, and exhaust manifolds. Blocks do not have to be "numbers matching," but they must be the correct displacement. Overbores up to .070" are allowed. Stock cranks only.
All Engines – 1.5 extra points allowed over advertised.
The camshaft must be correct for the year, model, and horsepower claimed for the type of lifter (hydraulic or solid). Roller cams NOT allowed.
The valve train must be factory stock for the year, make, and horsepower claimed.
The ignition system must be stock, including the distributor, cap, coil, and wires. Points may be replaced with any electronic conversion that fits under the stock distributor cap.
The carburetor must be correct for the year, make, and horsepower claimed. Jetting and metering changes are permitted. THE CHOKE ASSEMBLY MUST BE IN PLACE AND FUNCTIONAL!
Cast-iron exhaust manifolds are mandatory and must be correct for the year, model, and horsepower claimed. Internal modifications to the exhaust manifolds are NOT allowed. Under no circumstances will headers be allowed, including those cars that came with headers delivered in the trunk. Pipes must be routed as they were originally for the year, make, model, and engine combination. Mufflers must be stock looking in design, that is, oval in shape. No glasspacks or straight pipes allowed unless installed as original equipment. Maximum muffler inlet and outlet size is 2.5 inches. X & H pipes allowed.
The radiator must be correct for the year, make, model, and horsepower claimed. No lightweight, aluminum radiators allowed.
The camshaft must be correct for the year, model, and horsepower claimed for the type of lifter (hydraulic or solid). Roller cams NOT allowed. Duration at .050" lobe lift must be within 1% of factory specs. Lift at the valve must be within 2% of factory specs. Maximum stall limited to 2200 rpm.
The transmission must be correct for year, make, model and engine of the car. 3-speed manuals may be upgraded to the correct 4-speed if originally available.
The rear axle must be of the same manufacturer as the car. Any gear ratio is allowed.
Reproduction tires or radial tires only.You are allowed to run tires one size over stock.
Factory wheels only.

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