Re: engine swap
This is just based on what I've seen in magazines and some books. Haven't done it myself. Well, if your swapping from a 3.8L V6 to a 5.0L V8 you need the correct mounts, computer, engine wiring, possibly the correct front springs, radiator, it's shrouds, etc. Best to get a wrecked 91 with a 5.0L and transplant everything you need to your car. As far as performance, you are limited by the 89-97 T-Bird's low hood. Blame this on former head designer Jack Telnack. He did not want a scooped hood to fit the 5.0L in so the powertrain division developed a more compact upper intake which was later used on the 1994-95 5.0L Mustang. To put in an aftermarket intake you would need to either cut the hood, find an aftermarket hood, OR... there is or was a company by the name of BXR that made a compact intake that fit under the T-Bird's hood and made great power with or without a blower. The runners sat over both valve covers, had 3 different caps for the ends of the runners that tunned the runners for your desired power output. One for high torque, one for high horsepower, and one in-between the two. The design of the manifold required the reloction of the distributor, a half distributor drove the oil pump, a special one made by BXR was belt driven off of the crank. I think somewhere around 360-500HP depending on tuning and wether or not you used a blower. Hope this helps...
Master ASE Certified L1 Chrysler Technician- still a Ford fan at heart.
1964 Thunderbird Hardtop- Chantily Beige- 390 FE 4V V8-Uncle's Car
1966 Thunderbird Convertible- Red- 390 FE 4V V8- Uncle's other car- waiting for paint and body work!!!