u answered part of your problem in your question...
other than that
more gear
possible after market suspension cal tracs, slide -a-links etc...
i can tell you now that your 383 is not going to pull your 3400 Lb car out of the hole without a bunch of gear.......
so your 60 ft is about right for what you have motor/chassis and 3400lbs.
plus your tire size ( height) was never mentioned...this is a key role.
Brian
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Bjuice..
"I'M YOUR HUCKLEBERRY ! "