A-body Mopars — Dart, Duster, Valiant, Demon, and Barracuda — span 1967-1976 in their best-known form (the platform itself dates back to 1960). There are two factory situations to know about depending on your car's year.
What your vehicle came with from the factory
1967-1970 A-bodies had no factory evaporative-emissions hardware (California 1970 cars received the first factory canister). From 1971 onward, federal mandate required a factory charcoal canister and purge plumbing on all U.S.-market A-bodies. The canister was typically mounted on the inner fender in the engine bay.
What's vehicle-specific to watch for
- If your car is 1971 or later, the existing tank vent line and purge routing are often reusable — the Vapor Trapper drops in as a direct functional replacement.
- If it's a 1967-1970, plan a retrofit: switch to a non-vented gas cap, add a tank-top vent fitting if needed, and route the vent line forward to an engine-bay canister location.
- Worth checking clearances around the master cylinder, brake booster, and (on /6 cars) the long inline-six exhaust manifold before drilling mount holes.
- Big-block (340, 360, 383, 440) cars have less inner-fender real estate. The Low-Profile Vapor Trapper is worth considering on those builds, particularly with shaker hoods or aftermarket air cleaners.
Notable years & fun facts
- The Barracuda actually beat the Mustang to market by 16 days — debuting April 1, 1964 — but Plymouth lacked Ford's marketing muscle and the Mustang outsold it nearly 8-to-1 in year one.
- The 1970 AAR 'Cuda and Dodge Challenger T/A used a six-barrel induction (three two-barrel Holleys on an Edelbrock intake) — one of the most distinctive carb setups of the muscle car era.
- The Duster (1970-1976) was Plymouth's response to falling Valiant sales and outsold the Valiant 2-to-1 in its debut year — proving that fastback styling could revive a tired platform.
For the actual installation steps, see the universal Vapor Trapper installation guide — the procedure is the same across vehicles, only the routing and mounting changes.
Building something specific or unsure about routing on your application? Contact us with a few photos of your engine bay and tank area and we'll help you spec the right setup.
VaporCanister.com is an authorized retailer of the Vapor Trapper™ by Shop48.
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