See if you can find a CAI for it, they should make one for that...or atleast an S-10, same thing different name. Also, have an exhaust shop bend you a nice cat-back exhaust, preferably about 2.25", just so long as it's not crimped at the bends. Do that, along with possibly a clutch upgrade and you will be suprised how much that little thing will come to life. It won't make a rocket out of it, but it's much cheaper than swapping engines.
New Toy- Stone stock '88 T-bird Sport in need of some TLC
1988 Cougar XR-7- HO/T-5 conversion, cracked block prevented from reaching full potential.
RIP '88 T-Bird....firstname.lastname@example.org...best sleeper in So. Jersey, now it's taking a permanent dirt nap.