1970 Plymouth Cuda Grand Sport                                                                        NO 69

A beautiful example of the classic American Muscle car.

Engine: 383-CI 4BBL                83/4 Rear 3.91 Gear      Automatic 727-3 speed on original drive

Rally dash – factory all stock

150mph Speedometer

Power steering                                                                       Power disk brakes

Original green Grand Coup convertible                           Leather seats, Bucket with console

15” Rally wheels, on Goodyear Eagle white letter tires

Correct spare and bottle

Rim blow steering wheel – correct for car and works

Power windows Driver side remote mirror – sport mirrors

Shaker hood, wing, fog lights, hood pins, and rubber bumper

Correct exhaust manifolds, rocker moldings

Original build Sheet, high option car

The Plymouth Rapid Transit System

In car circles no other words elicit same the high energy response as “Hemi!” The highlight of the marketing of this engine in 1970 model year was Chrysler Rapid Transit System (RTS) which was made up of some of the fastest cars in class of that period. Charter members of the RTS were the renown 426 cid Hemi Cuda, the GTX fleshed out with either the 426 Hemi or 440 4 bbl, the same choice was available in the Road Runner and Sport Fury GT with the 440 cid 6 bbl Holly Carburetors, and the light Duster came armed the 340 cid blaster. About this the Plymouth marketing people wrote:


“Those of us at Plymouth who design and build high-performance cars have been inspired to go beyond just offering cars with big engines, good suspensions, great brakes, and fat tires.

We now have a system. An integrated program. . . It’s a total concept in high-performance transportation which combines the lessons learned in competition, an information network, people who understand high-performance, trick parts and great products. The Rapid Transport System is years of racing experience at Daytona, Indianapolis, Riverside. . . It’s the cars themselves, drag racing cars, Grand National stackers, rally and Championship cars. And it’s the input (and output) gained from all this racing.”


The leader of this pack was undoubtedly the Hemi Cuda. Designed by Carl Cameron, to fit any engine option Chrysler offered, the 1970 Plymouth Cuda was one of the cleanest most recognizable designs in automotive history. But all the cars of RTS looked good and ran well. Below we have the average quarter mile speed and time as registered by professional racers Sox and Martin. The handling time was registered over three laps at Willow Springs Raceway.

Time                    Speed                             Handling                                            Ave Speed

426 Hemi Cuda                               13.54                  107.26                         1:52.7                                              79.86 mph

                    Weight: 3825 lbs

383 Cuda                                                14.39                    98.98                              1:51.9                                                  80.43 mph

Weight: 3575 lbs

Road Runner 440 +6                    13.61                  106.10                          1:50.3                                             81.06 mph

Weight: 3965 lbs

GTX 440 +4                                           13.62                   102.91                              1:53.8                                                 79.09 mph

Weight: 3795 lbs

Duster 340                                        14.07                 100.09                         1:50.9                                             81.15 mph

Weight: 3265 lbs

For the specs on the engines available on the vehicles of the Rapid Transit System in the 1970 model year see below. The Lang Collection is fortunate to have so many prime examples of these fine automobiles.

From information secured at http://www.allpar.com/plymouth/rapid-transit-system.html