Not sure about the Auto's but 5sp came prewired for a tach under the dash. Been awhile but I think it was a 4 pin connector close to the driver side kick panel. Pretty sure my Uncles 93 didn't have a tach std or factory option but you could have a dealer install one.
------------------
4-sale or Trade
'99, 3/4, QC, SLT, 4x4, ISB, 5sp, 3. 5xlsd, tow pac, HD tcase, tow mirrors, camper pac, White over driftwood, Mist gray interior. With less than 19,000 miles.