Ok I was cartesting, I dunno if you've used Cartest.. anywho...
I did some different methods of testing. My results came up as a 15.0-15.4 quarter mile, 6.9-7.4 0-60. BUT Cartest was off big time on our cars, along with other cars with more torque than horsepower.
Considering if you have port matched your lower intake with your upper, you're low end torque has decreased. (TORQUE itself has INCREASED a lot) You should reach peak torque between 3700-3900 rpms, like the modern Vulcans (which have only been modified in the lower intake manifold and possibly throttle body).
I think you could be reaching 14s...the weight of the car is what's keeping it down. Stock (non fully loaded) MTX LXs have been rated at 2,790-2,850 pounds, with the 4 cylinder N/As 70 pounds behind. Did you know that the turbo cars weigh more than the 3.0? Anywho, I think you have a good chance.
Unfortuently with my slushbox, I dont have much hope for my car. I may end up getting the upper intake manifold port and polished along with the 5.0L throttle body from Jason King, then port and polishing the lower intake manifold. That should get me up to around 170hp+ and hopefully into the 15s. That'd be nice to have a 3.0L ATX hitting 15s.