400 small block i think.
anyway... i had a lot of fun in my 85 t/a ws6. I would buy one again for 2 grand that runs well. I bought it in Texas and drove it across the country, from TX to NC/TN and then back to Wyoming. a great road trip. sold it about 2 years ago when i bought my jeep.
one in perfect shape is worth 4 or 5 to someone who wants it. I love the 80'stastic interior, the flip up headlights, the overall look of the car.
think knight rider, not bandit.
the t/a body style is quite stable at high speed because of the amount of down force on the front wheels, with a well upgraded suspension and welded in frame connectors it is a really great car and amazingly stiff.
84 is throttle body right? the tpi cars started in 85 i believe. Tuneport is much, much better. multiport, bank fire FI. you can upgrade to the 350 injectors and get some more horse for cheap.