Engines with lack bottom end power?

What's torque? I have none-My all original 67 Dart 270, 273 2 bbl, came with 2.93 rear gears and D78-14 tires. In the slow quest to change to the big bolt pattern, I got the 7 1/4 rear swapped for a 8 1/4 with 2.71 gears and put 225-70-15 tires. Talk about a dog, I don't think I've ever been able to spin the tires, (they last longer that way) :lol: . The upside, I can run 90 mph on the Interstate all day long and get 20-21 mpg's. I do plan on a 4 bbl swap. I've refrained from doing any modifications, beyond making it more safe to drive. It still has the original single exhaust and the valve covers had never been off the engine prior to me putting on new valve cover gaskets.

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