repop rallye dash tachs (are these any good)?

Would i be better off leaving the factory vacuum gage then, and just running a shift light?

I really dont like hanging a tach off my steering column, or screwed to the dash. Especially when theres a spot for one right in the dash.

Another option i thought about was to make a blanking plate out of some 1/8" aluminum plate i have. And cut a hole in it to mount an aftermarket tachometer like an autometer tach inside the cluster.