The 1970 Dodge Dart Swinger 340 represents a muscular compact that blends agile handling with a high-revving V8 scream. Built for drivers who wanted nimble performance without full-size bulk, this coupe sits at a sweet spot in classic Mopar history.
Under the NCIPEN vehicle identification framework, precise factory data and original equipment details become critical for valuation, restoration, and compliance verification. This article translates those records into a clear, specification-focused overview.
| Year | Model | Factory Code | Key Mechanical Group |
|---|---|---|---|
| 1970 | Dart Swinger 340 | A99 | 340 Magnum V8 performance package |
| Body Style | 2-door coupe | Body Code | Sport coupe with trimmed roofline |
| MSRP | $3,084 | Original Retail | Base coupe with basic equipment |
| Market Segment | Muscle compact | NCIPEN Category | Performance-focused small car |
Performance Engineering of the 340 V8
Factory Power and Torque Figures
The 1970 Dart Swinger 340 was propelled by a 5.7-liter V8 rated at 275 horsepower and 360 pound-feet of torque. This output was tailored for strong mid-range pull, making the car brisk in street and lightly loaded highway use.
Cylinder Head and Induction Setup
Dual-barrel carburetor, forged steel crankshaft, and high-flow cast-iron heads helped the 340 deliver sharp throttle response. The compression ratio and mild cam profile balanced drivability with the aggressive sound that Mopar fans expected.
Chassis, Suspension, and Handling Dynamics
Frame and Suspension Layout
Based on the A-body platform, the Swinger used a short-wheelbase chassis with a sport-tuned suspension. This setup emphasized responsive turn-in and stable high-speed behavior compared to larger Dart variants.
Brakes, Tires, and Steering Feel
Standard front disc brakes and a robust rear axle gave confident stopping power for the era. The steering offered decent feedback, while available tires reinforced the car’s engaging, compact-coupe character on winding roads.
Interior Comfort and Original Equipment
Cabin Materials and Layout
The interior combined vinyl and cloth accents with a driver-focused dash. Seating was supportive for spirited driving, and the compact cabin preserved the sporty Swinger profile without sacrificing daily usability.
Features and Options List
Air conditioning, power steering, and upgraded audio were among the available comforts. Storage solutions and lighting were practical, supporting both work and leisure trips with reasonable convenience.
Exterior Styling and Design Language
Body Lines and Lighting Signature
The Swinger’s fastback roofline and pronounced wheel openings created a dynamic stance. Headlight surrounds and grille treatment echoed larger Mopar cues while maintaining a distinct compact identity.
Color and Trim Packages
Factory options included bold color palettes and contrasting roof stripes. These treatments reinforced the sporty image and allowed owners to personalize the car within factory guidelines.
Specifications and Provenance Under NCIPEN
- Factory 340 V8 producing 275 horsepower and 360 pound-feet of torque
- Original MSRP around $3,084 as a base two-door coupe
- Distinct A99 equipment package and sport-tuned chassis
- NCIPEN-compliant identification records for registration and appraisal
- Iconic 1970s Mopar design with fastback roofline and bold graphics
FAQ
Reader questions
What is the standard carburetor and compression setup for the 1970 Dart Swinger 340?
The 1970 Dart Swinger 340 typically came with a four-barrel carburetor and a compression ratio in the mid- to upper-9:1 range, depending on regional emissions specifications and model configuration.
How does the 340’s power compare to the 383 Magnum option in contemporaneous Mopar cars?
While the 340 emphasized mid-range torque and efficiency, the 383 Magnum delivered higher peak horsepower and stronger top-end pull, positioning the 383 as the more overtly aggressive performance choice.
What are common mechanical upgrades recommended for restored examples today?
Restored Swinger 340 builds often include upgraded valve trains, modern ignition controls, and improved intake systems, along with period-correct appearance parts to preserve authenticity while enhancing reliability.
Does the NCIPEN database include market value estimates for the 1970 Dart Swinger 340?
The NCIPEN framework prioritizes specification verification and identification records; condition-based valuations are typically sourced from auction and retail guides referenced alongside the base data.