Add Factory Tach or Not ?

[79 Silverado/454]

I have a pretty much survivor 79 short bed numbers matching big block truck. The truck is pretty much loaded up with A/C, PW, PL, tilt ,cruise, AM-FM radio, ralley wheels etc. The previous owner added the factory bed rails and aftermarket sliding rear window according to the SPID in the glove box.

I recently picked up another 79 gauge package with factory tach and I was thinking of changing out the current gauge package which has all the gauges with the clock to the one with the factory tach after I have it checked out and restored. I would be leaving my current speedometer in as that is the actual miles on the truck.

My question, do you think adding the tach will hurt the value of the truck or would it make it more appealing ?

I hate to give up the clock but, IMO the tach would be way cooler especially since the truck is a factory big block truck.

I would of course hold on to the original gauge package in case the next owner would want it.