The older alternators were notorious for melting the side plug. Many upgraded away from that to the next version . commonly from like a Taurus and such. Higher output and no melting of the plug.

Front cab mounts are a common issue. Not sure how well the ladder bars will be on the street.

You will have to make completely sure both the gear ratios and tire diameters are a match or you will break the transfer case. Also, the driveshaft is not likely to be plug and play. Also, need to be sure the leaf spring is the same width and...

Fair chance the variable resistor in the headlight switch has failed, pretty common. Turn the knob, maybe wiggle it a bit as you do and see if the cluster lights may come one, even if only a flicker. If so, then it shows power. If not, still be...

The wire to the key is likely for the key in ignition remimder chime, the other would be for an automatic shift light indicator on the column. You could plug it is where the other connects and see if everything that you are about works. If it...

If it is the relay itself, simply replace it. However, it sounds more like a control issue. The body control module controls that relay, turning the connection on and off. If you bypass it, you will then likely just have power full time, and then...

May well be the ignition control. The old DSII boxes were dual powered, 12 for start, 9volt for run. It is possible the one circuit has gone bad, which would be once you release, it switches back to the 9V circuit and tries to fire. The TFI...