if you put a calais dash in an executive the oil pressure gauge won't work......the executives have a oil pressure switch not a oil pressure sender(as do the calais)the oil pressure gauge will be all the way up as soon as you turn the ignition on. a pressure sender was about $90 when i last asked about one. as for putting the das in all you have to do is take the surrounds off, undo the four screws that hold the dash in, unplug the loom & the speedo cable. 6the rest is just a reversal of the removal...
Click the scales.....you know you want to!!!!