You won't see that kind of increase in torque with an IT build. I bet 145whp and 175ft/lbs is very doable. A 100% IT build would really wake this baby up. I had an 88 Formula with a custom cat-back that ran 15.4 in the 1/4 mile...and these cars are NOT light...2750lb curb weight.

Do a nice tune up, cap, plugs...catalytic converters a know to get clogged up as well.