340, How much horsepower? 1/4 mile time?

How much horsepower? 1/4 mile time? Here is what I have:

340, 340 steel heads with 2.02/1.60 (light weight stems), blending in the bowl area, Isky hyd. cam .505 lift, 292 dur, Rhoads lifters, Aluminum adjustable rockers, Mopar M-1 single plane intake, 1 inch Super Sucker carb spacer, 650 Holley Double pumper, steel 340 crank, stock rods, Speed Pro .30 over pistons 9.5:1, Hooker Super Comp fender wall headers.

I will also be running mopar electronic or MSD ignition, have both but have not decided yet. Also running a 4-speed, 4.10 gears with a sure grip, mopar super stock springs, and 28x9.00-14 cheater slicks out back. The car is a 1966 Valiant, all steel. Any suggestions? Thanks! Keith.