I'd say its possible, though it would be easier with a 5 speed. I ran a 13.9 with the stock long block, 3:73's, underdrive pullies, 2 1/2" full exhaust w/ unequal shorties, 73mm maf, 65mm tb, and LCA's and I had room for better times with better driving. But i have a 5 speed too.
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