PI Swap. What you need to do.
Here's the list.
a) swap oil pans and pick up tubes.
b) swap oil filter tree? adaptor? ( not sure what it's called)
c) grind, cut motor mounts ( very easy)
d) 96-97 t-bird EGR tube
e) relocate Temp gauge sensor
f) 96-97 T-bird or 96-2001 GT intake tube
g) bend a/c lines to clear 2000 GT idler pulley or replace timming cover with 96-97 T-bird cover. 94-95 T-bird covers wont bolt up.
h) 99-2001 GT uses a different connector for the IAC valve than the 94-95 T-bird.96-97 T- birds are ok. If your engine comes with a harness just splice the GT connector on to your T-bird harnes. They use the same color coded wires.
i) 96-97 T-bird vacume harness
j) Ford does'nt make the 96-97 T-bird intake plenum anymore ( the part that has the 4.6 L plaque on it) So you'll havt to use the GT plenum which does'nt have the brake booster vac. port. You'll have to either drill and tap a new port into the plenum or just use a vac tee to tap into one of the vac lines ( thats what I did. It worked out great.)
k) GT torque converter
l) GT 8 bolt flex plate
m) modify engine harness. You have two choices. Lengthen only the wires that need to be lengthen or unravel the harness and convert it to a 96-97 T-bird harness( A whole lot of cutting and splicing invloved!) I've seen it done both ways and they both looked O.E. It comes down to how much time you have.
n) buy T-bird headers or extrude hone your exhaust manifolds.
o) install a true dual exhaust or replace your exhaust with larger diameter pipe.
p) 96-97 T-bird fuel rails
q) 99-2001 GT MAF sensor or equivalent after market sensor. I used a 2000 Lightning 80 mm MAF sensor.
r) have a chip made or have your computer reflashed. The engine will run with out a reflash and the stock MAF sensor but it won't run at 100%.
Well I think thats all of it!!Feel free to email me if you have any questions.