So the two 'blanks' to the right of the instrument cluster....what should go in there? Tach? Volts? Oil P? Someone told me that just because mine has a clock in the cluster doesnt mean the wire for the tach is missing. It should be there somewhere? What other gauge should go into those spots besides a small tach? Where do I find them and how do I find the instructions to wire them up.
Any help appreciated.

 

The two blanks were designed with the turbo version in mind. If you remove the instrument cluster and look to the left you'll find a red and white wire . That;s your tach wire. Go to the wrecking yard and find a 240 that has the tach instead of the clock , and look for the little round clock that goes into one of those two blanks. Make sure you get the plug that goes with the little clock so you can plug it in on the back of the tach one you do the transfer. In the other blank you can install a voltmeter , found in any 240 turbo. Find a junkyard that has a lot of Volvos and you can get those parts dirt cheap.