The dash does have the tach but will be a pain to remove everything.
Not as hard as you think. The white plastic housing that holds,the gages you unscrew from the dash. Should be phillips screws around the perimeter. Then you slide the,whole assembly towards you, disconnect the wiring harnesses from the back, unplug speedometer , and tach, which uses a seperate added on harness. Trace tach wires to ground,ign hot , coil at bulkhead.
The only wire harness you need to get besides the cluster assembly us the added on tach harness 3 wires. The entire rest of the dash wiring isnt needed as the same dash harness and plugs was used for all of them. That cluster complete, with the add on tach harness us prob worth an easy $100 to the right person.
It was a very rare option. Back in the 80s i'd junkyard crawl in new jersey about the time these cars,were hitting the yards,with rust issues. I had a 77 charger at the time. I could never find a tach optioned doba, charger, or magnum. And i looked thru a lot of cars. I saw a tach option on a black and silver magnum XE GT t top car at mopars at englishtown back in 88 it was the last time i had ever seen this option till now.
I could get the whole thing out in about 30 mins. Theres gold in them thar cordobas.
