97-92 Cherokee Options

I want to swap in the full gauge cluster. I already have all the gauges, except for a tach. Do i still need to change the oil and coolant sensors? (though the oil gauge is pegged out, will work occasionally, small break in wire was repaired, another exsists possibly?)

I have map lights on the front dome, but were any of these equipped with mirror lights too? I'd imagine I'd just have to splice into wires for the dome for this.

89 Cherokee Pioneer

Oh also, chrome grille headlights inserts and bumpers are just bolt on, right?

I just swapped in a cluster with tach today. I previously had the cluster with all the gages but no tach. New cluster plugged right in and everything worked including the tach. Mines is an 87 Pioneer.