Chrysler’s A12 Road Runner Was 1969’s Six-Barrel Barn-Door Bomb
Thankfully, muscle car buyers who were priced out of the HEMI market weren’t out of luck. The Plymouth Road Runner A12 arrived as an affordable mid-year package to meet homologation rules, and it didn’t skimp on raw power to deliver the thrills Chrysler fans wanted. It packed plenty of power with the six-barrel to dominate the NHRA drag strips, while the more expensive 426 HEMI was designed for NASCAR. There was some HEMI overlap, but the A12 actually launched about $800 to $1,000 cheaper than the Road Runner HEMI.
Plymouth Had Homologation Rules To Meet
The Plymouth Road Runner A12 is a high-performance package that arrived with a mid-season launch in February 1969 for one specific reason. The reason was drag strip dominance. Plymouth wanted to dominate NHRA Super Stock drag racing and the escalating street wars. Due to homologation requirements, at least 50 production-ready models had to be available to the public.
This meant that a factory-built track-ready monster was available straight from the showroom floor. It also arrived at the perfect opportunity for Plymouth to expand in the market by capitalizing on what enthusiasts were already doing. Plymouth executives noticed that buyers were independently upgrading their base 383-powered Road Runner cars.
By offering a high-performance factory option, Chrysler eliminated the need for modifications. Buyers also benefited from the raw power they could access at an affordable price, as the 440 six-barrel was introduced to bridge the gap between the 383 cubic-inch (6.3-liter) B-series V8 engine and the 426 HEMI.
A 1969 Road Runner HEMI originally cost about $4,400 to $5,000, depending on whether it was equipped with an automatic transmission or goodies like an upgraded axle package. The engine upgrade itself cost $813.45, but the Road Runner A12 package only cost $462.80 to add, bringing the typical factory cost for an A12 model to around $3,565.80 to $3,663.20. The base 383 model rang in at about $2,945 to $3,083, making the A12 upgrade an exceptional bargain.
The 1969 Plymouth Road Runner A12 Was Ready To Race
The 1969 Plymouth Road Runner A12 package featured the 440 (7.2-liter) Six-Pack V8 engine setup with three Holley two-barrel carburetors on an Edelbrock aluminum intake manifold. Other heavy-duty parts include a forged steel crankshaft, stronger valve springs, and a 26-inch radiator.
It delivers a factory-rated 390 hp and 490 lb-ft of torque, but dyno tests put its actual output closer to 400 and 430 hp. The 383 engine cranks out 335 hp and 425 lb-ft of torque, while the 426 HEMI provides 425 hp and 490 lb-ft of torque. The A12 package allows this muscle car to accelerate from 0 to 60 mph in about 6.0 seconds and complete a quarter mile in about 12.9 seconds at around 105 mph with a top speed of roughly 120 mph.
Also, the engine could be paired with a heavy-duty A833 HEMI four-speed manual or a 727 TorqueFight automatic transmission. Each A12 model includes a 9.75-inch Dana 60 differential with a 4.10 gear ratio and Sure-Grip positive traction. The heavy-duty police-spec suspension includes torsion bars, leaf springs, and firm-ride shocks. Robust 11-inch drum brakes on all four corners provide confident stopping power.
It has distinct visual no-frills weight-saving cues, as the lightweight fiberglass lift-off hood is held in place by four steel hood pins instead of traditional hinges. It is referred to as being “barn door-wide” and features a large forward-facing scoop to deliver cool air directly to the carburetors. Plus, it’s painted in a textured semi-black finish known as “Organosol,” and it rides on 15×6-inch stamped steel wheels without covers or hubcaps.
The A12 Road Runner Only Lasted For A Year
The Road Runner A12 package wasn’t exactly discontinued because it was a special one-year-only promotion that evolved into a standard production option for 1970. It was designed as a targeted response to rivals, delivering a recipe for racing success that was widely adopted across multiple Chrysler models such as the Road Runner, Charger, and Challenger.
Most of the components could be shared. For example, the 1969 Dodge Coronet Super Bee A12 package was launched with the same hardware, styling cues, and similar pricing. Parts of the package inspired the designs on later models, including other functional hood designs like the N64 Air Grabber in regular production models.
A12 aesthetics heavily inspired future factory designs, like the distinct Shaker hoods on E-body Challenger and Barracuda models. It also led to the dual-snorkel hoods of the 1970s and the Air-Grabber hood scoop on the modern Dodge Challenger SRT Demon. Plus, it’s attributed with inspiring the sinister sleeper style as builders ditched loud chrome wheels for color-matching or plain black steelies built for racing instead of car shows.
Plus, the three Holley two-barrel carburetor setup became so popular across the brand that Dodge adopted it as the Six Pack and Plymouth called it the Six-Barrel. It replaced the universal term for triple-deuce carburetion and became so popular that Chrysler integrated cast-iron variants into the mainstream 1970–1971 engine options.
Collectors Don’t Let Rare Road Runner A12 Models Go Unnoticed
About 1,412 1969 Plymouth Road Runner A12 units were built. Roughly 615 of those models may have been paired with the automatic transmission, while the rest got the manual option. Collectors and historians believe that 250 to 300 models may still survive today based on registries. Most models were heavily modified, raced into the ground, or lost to the elements of time.
Collectors are willing to pay a premium for rare survivors. Models found in project condition sell for between $50,000 and $75,000. Then examples found in good or average driving condition fetch between $75,000 and $110,000. Road Runner A12 models in great condition will cross the auction block for between $110,000 and over $145,000.
The top-tier models in pristine condition will sell for between $150,000 and over $165,000. One clean example recently sold for $170,500. It was a manual model with 20,806 miles on the odometer. Both the automatic and manual transmission models hold plenty of value. Factors that demand higher premiums include rare color combinations.
Source: Hemmings, Sports Car Market, Mecum
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