217 @ .050 is not extreme, that dent will hurt power, but not too much. I would suggest getting 3.55 gears. Those gears and some tuning should easily get your car into the 13's. You may want a higher CFM carb (I am running a 750), but not before you get new gears.
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67 Fastback - Arctic White Pearl paint
351W ,Trick Flow Aluminum Heads, Edelbrock TorkerII, Comp. Cam, Performance Automatic C-4 Trans, 3.55 gears, Front Disc Brakes, 1-1/8" Fr. 3/4" rear sway bars.
My 351W Fastback