07-13-2019, 11:47 AM
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Senior Member
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Join Date: Mar 2017
Location: ABQ, New Mexico
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When Ford contracted with Dearborn Steel Tubing to build 100 Thunderbolts in 1964 to run in both Super Stock and A/FX, Mercury also placed an order for 21 Comets which were to run in the A/FX class. S/S only allowed a 7" slick while A/FX allowed a 10" slick, along with high performance parts that the factories sold which were not available on their production cars. Minimum weight was 3000 lbs. A/FX also allowed you to take an engine from one car and put it in another which was not an available combination from the factory - like the 1962 421 SD Tempests that Pontiac had built. The 427 Hi-Riser is a "full tilt boogie" with 14:1 CR and puts out close to 600 HP. How fast? 11.05 ET.
Due to the rules of A/FX, you couldn't run the same body style/car the following year so for 1965 Mercury went to Bill Stroppe Engineering and had built a handful of A/FX 427 SOHC Comets. Over 700 HP! ETs in the low 10s
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