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I think a cast 390 crank will work fine, as early 427's had them. They're supposedly stonger than chevy cast cranks, and I heard drag racers sometimes prefer the cast units over the heavier forged ones. If you are going to use a FT crank, you need to turn down the snout, and also shave off some of the thicker flywheel flange, as at one time I was looking for such a crank.
My stock stroke 427, with hi-riser heads and single four makes the same torque as my 472 stroker with medium riser heads and a single four.
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"After jumping into an early lead, Miles pitted for no reason. He let the entire field go by before re-entering the race. The crowd was jumping up and down as he stunned the Chevrolet drivers by easily passing the entire field to finish second behind MacDonald's other team Cobra. The Corvette people were completely demoralized."
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