My '85 stock was recorded at 7.5 0-60 and 15.7 1/4 mile. Since they're exactly the same engine I'd say the '84 is pretty close. I think I've greatly improved my 1/4 times but don't have timeslips to prove it. There's a website that shows all the 1/4 mile times for cars. . . http://www.missouri.edu/~apcb20/times.html
My 84 is as about as stock and original as it gets: Even has
the original exhaust and Goodyear Eagle GT tires. The only
things not original are standard replacement parts such as
plugs, battery, and fuel filter. Best time was 15.4@89 with a
2.48 60 foot time. A better 60 foot time could net a 14.xx slip.
There were 50k miles on the car during that run