This install is easier than you might think.
Get a 5.0 out of a 87-93 Mustang. Forget the ones out of Crown Vics, other T-birds or Cougars. They do not have the heads or the cam to make a decent ride, they pump about 150 horse compared to the 225 out of a stock Mustang. You keep the Tbird's chassis wiring harness in place, you know, the stuff that goes to the ignition, coil, starter, headlights and dash. You take the kick panel by the passengers right foot and pull out the computer by the glove box. You'll need to pull all of the the Tbirds existing fuel management wiring harness out of the car running from the top of the computer to the fuel injectors. You'll need the 'stang harness and computer. It may seem like a lot but all the controls will fit right on the Mustang's motor. Of course, you'll need to trade computers from the stang to the T bird. That's it in a nutshell as far as parts are concerned. The auto in the Tbird probably won't hold up so well to the Mustang 5.0, so you might want to consider putting a Stang auto in there too or a 5-speed T-5. I'm doing this in my '83 Tbird. It has CFI injection, which is trash for performace. If you have the later Multi-port injection system like what was on the Mustangs, the swap will be about ten times easier. Just trade the motor and computer and go.
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