im running 64 center, 84 front and back with the promax plates.

with crappy tuning, and cherry bomb mufflers hanging off the headers (i think they were 1 1/2" diameter thru the muffs), i ran 8.1 in the 1/8th about a year ago with my 416. cam was smaller than yours, compression about 9.7:1, 4.30 gear, 275/60/15 tires.

i havent been to the track since i changed the exhaust to 3" and changed a few other things.

It's got a cop motor, a 440 cubic inch plant, it's got cop tires, cop suspensions, cop shocks. It's a model made before catalytic converters so it'll run good on regular gas.