No, the front end of 92 - 96 Broncos is completely different than 87 - 91 Broncos.
Yes. The Bronco body style didn't change again until after 1989.
The temp gauge may stop working on an 89 Ford Bronco if it is defective, the temperature sensor is damaged, or the wiring has come loose. All can readily be fixed by checking each component separately.
Underneath, back of engine, passenger side.
I believe that is 30 to 40 PSI
they started a new body style in 1992 so no , unless you changed out the whole dog house including core support
You can find the fuse box diagram, for your 1989 Ford Bronco, by taking the fuse box cover off. The diagram of the fuses is on the bottom of the cover.
The PCM for the 89 Bronco is located on the firewall on the driver side. You can access it from inside the cab, behind the parking brake pedal.
If it works -- go for it
140 horse power @ 4600 rpm
u can take out the play in the wheel threw the steering box
The general consensus with most performance oriented Bronco owners is that original Ford Autolite or Motorcraft spark plugs work just as well or better than most "performance" spark plugs.
start up your bronco,let it idle, pull the tranni dip stick and see if there is nay oil in the tranni