Fastest time with a 268dur cam?!

Back in 1989 I stuck a Crane 693511 and matching springs in an otherwise bone stock '68 340 long block with cheapie headers and a '71 Thermoquad intake and carb, and a 175hp nitrous plate. Specs: intake 212° @ .050, 268° .459; exhaust 220° @ .050, 276 ° .480; 112LSA
That went into my '74 Barracuda with a 4sp. Car had 3.23s, and a 4spd. I drove it daily, and at the time in CT it needed to pass the idle emissions test. I never checked mileage but it did pass the test easy enough. That car went 13.20s with me rowing it, and with the nitrous plate 12.70s. It was about 3500lbs with me in it. They make plenty of steam if the combo is right.