Kind of slapped together
Join Date: Jan 2010
Location: Bossier City, LA
You'll have to rewire the connectors - the connectors are wired different between the four gauges available that year, not to mention in year ranges.
However - before you even THOUGHT about that - I'd HIGHLY, HIGHLY, HIGHLY recommend picking up an EVTM (from eBay or Helm Inc.) and checking that out.
As for tach - if you add the wiring, and change the connector, it SHOULD work if it's like the 1991, where it's off the coil for the 3.8NA and 5.0HO (off the DIS, but the same basic signal, for the 3.8SC).