provide us with the VIN and we'll see what it says.
Whatever the case, unless it is a Euro version, your instrument cluster is in question. 84 or 85 should have a tach.
Where is your air cleaner? Just to the right of valve cover or more up by the right headlight area?

__________________
Jimmy L.
'05 Acura TL 6MT
2001 ML430 My Spare

Gone:
'95 E300 188K "Batmobile" Texas Unfriendly Black
'85 300TD 235K "The Wagon" Texas Friendly White
'80 240D 154K "China" Scar engine installed
'81 300TD 240K "Smash"
'80 240D 230K "The Squash"
'81 240D 293K"Scar" Rear ended harder than Elton John