Agreed. Been there, done that with 435 stock, 503 CAI/Tune and 535 pullied, all onF1s. They're friggin grease. I've had stock 3.31s and 3.73s and Bob's right...the only way you're gonna see a dub 1.70 is either lining it up on the rears or on DRs.
1.68 on these F1's plus you say you spun in 2nd gear? But it appears that you had a 4.9x 330? Those are drag radial numbers, not greasy goodyear times. Dude I gotta say you're one hell of a driver to be able to put those kind of numbers up. Got any pix of your car on the line with that number on it? I'm skeptical.