[SoCal Driver]

How much of the 86 engine are you getting?

The major difference is the fuel rail. You will want to take your fuel rail off the 83 engine (don't disconnect the hoses) and swing it up out of the way then put it back on the 86 engine. Reason: The hoses from/to the fuel tank connect differently.

I've found that the newer temp sender for the dash temp gauge uses the same resistance scale so you can hook the old single wire to the two pin sender. One of the pins is an on/off for the 86 dash idiot light so you will need to try both to get the right one.

The oil filler and breather has a larger hole on the bottom than the one off of the 83 so be sure to get the one that comes with the engine.

As to the power steering mount on the bottom of the engine: Just leave it on till you redo the counter balance shaft seals. You have to pull the back or engine side of the belt covers to get to the bolts.

If the 86 engine comes with the steel tubing exhaust be warned that this cracks in the base of the Y on the 1-4 section. I had to go back and use the cast iron headers because of this.

Note that the AFS (yes it is a Sensor as it does not meter or control the intake air) for the 86 uses a different base voltage than the 83. You can't use this on the 83. Now if you wanted to take the time and transfer the DME and AFS and the harness and a couple of other DME items over it would be to your long term benefit.

You will also need to use the polyrib belt pully off of the 83 as it has one less rib than the 86. You could use the alternator off of the 86 with just a minor bit of rewire. Think it has about 20 some odd more amps.

If you want to remove the 86's power steering pully then you will need a really big breaker bar as the bolt going into the crank is one tough MF!