I think you should be able to meet your goal. My car is real similar with a few differences:

850 DP instead of 750 vac sec.
SS springs
9.5 Dynamic converter
90/10 Calvert shocks
Stock 452 heads
Engle hydraulic cam with .534 lift, 238 @ .050 duration

It usually runs 7.90s in the 1/8 at Barona (best ever was a 7.86) with 1.68 to 1.70 60 foot times, I think that would be like 12.30s to 12.50s in the 1/4 according to the calculators. Maybe someday I'll meet you up at Fontana and we can do some '66 vs. '67 runs and I can get a 1/4 mile time.

I agree on getting some bias ply slicks and a good converter.