What wrong with the Challenger in this movie

autoxcuda said

Racer do that for class reasons too. “Factoring”, correct?

There was a pink Challenger class racer that changed from a 1970 T/A 340-6bbl to a 1971 Challenger 340-TQ-4bbl with optional T/A hood

removed the T/A stripes and changed the intake and carbs.

These two cars are the same. Chrysler sent them a “kit” of parts to swap from 68 GTX to 69 A12 Road Runner.

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Correct! I heard that the pink Challenger ran better as a '71 with a Thermoquad than it did with the 6-pack!
When I raced IHRA Stock, I converted my original '74 Duster to a '75 Dart Sport not only for the styling preference & hood scoop, but it was the heaviest A-body putting it one class slower than other fast cars. Also allowed me to put more weight in back!

I think this was the Challenger: