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Non Believers LOL
Not only did they do it, they did it bragging, and as a advertisement Logo.
"In 1968 with the intro of the Plymouth Road runner, Mopars claim to fame was Speed on a budget, designed to run 100 mph in the 1/4 mile and sell for under $3000".
You probably wouldn't believe this same car with a little work, still carrying stock 906 heads, and Factory fuel system wouldn't run no where near 11.20's in the 1/4 either...
Rapid Transit's Believe it or not


a 383 RR w/ 3.55's on bias tires, even tuned to the nines, with a pro driver wouldn't do 14.0's...maybe [Email]14.40@95[/Email] maybe.
and it will need a TON of work, meaning stroker, roller cam $$$$$ in head works to run in the 11's. If not I want to hear the combo so I can build one.



fast68plymouth's roadrunner with a 383 and UNPORTED 906 heads is an 11 second car....



Apples and oranges, it's far from stock. Getting back to the question, Did you check to see if the outboards were full 100% open? I even had a 750 Eddy carb choke flap suck down on me causing the 67 to slow. I had to wire it open...