Muscle Car Facts

Information About Classic Muscle Cars

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Dec 04th
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1970 GTX Hot

"So you're sitting at the drive-in with your chick in your 1970 GTX or Road Runner. It's got a hood scoop. It's no ordinary hood scoop. It's not manually operated, that's old, down the tube. It's vacuum operated. That's right, man. Just flick a switch and the lid does a semi-slow motion act up or down. It's gotta be the thing that does it this year."--MT, September 1969
  • The body style was beginning to age and sales were down dramatically in 1970. Just over 7,000 GTXs were sold versus over 14,000 in 1969.
  • The famous “Six Barrel” was offered for the first time in the GTX on the 440 big block. The “Six Barrel” consisted of three two barrel carburetors lined up in a row. It produced 390 horse power compared to the standard 440’s 375 horse power.
  • The GTX came with a TorqueFlite automatic transmission standard. The four speed transmission was a no cost option.

For 1970, Plymouth updated the grill and the rear. Of all the front end treatments of this body style, the 1970 grill looks the best. Other changes included an updated hood with a much cleaner looking hood scoop. On the rear quarter panel a simulated scoop was added that detracted somewhat from the clean lines of the previous year.


After four years, Plymouth finally added a third engine option to the GTX. Now buyers had a choice between a 426 Hemi, a 440 Super Commando with a four barrel carburetor or the new 440 Six Barrel. The 440 Six Barrel has a trio of two barrel carburetors mounted on an Edelbrock aluminum manifold. This set up was good for about 35 hours power over the standard Super Commando 440.


In keeping with the performance theme, Plymouth equipped all the GTX models with their most durable suspension. It was the same suspension that came standard with the Hemi equipped models. The Hemi suspension included 11 inch drum brakes with the option of disk breaks up front. Heavy duty shocks, torsion bars, front stabilizer bars and additional rear leaf springs were all included.

 

1970 GTX Statistics

  GTX 440
Base Price $3,535
0-60 Time 5.8 sec
1/4 Mile Time 13.7 sec @ 102.8 mph 
Engine Used 440ci/375hp
Source Motor Trend Jan/69

 

Production Numbers

  Hardtop Convertibles Total
440 Super Commando 6,398 - 6,398
440 Six Barrel 678 - 678
426 Hemi 72 - 72
       

 

Available Engines

Code Size Cubic Inch Fuel System Horsepower @ rpm Torque @ rpm
440 440 1x4bbl 375 @ 4600 480 @ 3200
440 Six Barrel 440 3x2bbl 390 @ 4700 490 @ 3200
426 Hemi 426 2x4bbl 425 @ 5000 490 @ 4000
         
 

 

1970 GTX's For Sale

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