vacuum gauge to solve idle issue

Hi Kimmer, no the factory tach is still reading off. I have been putting off pulling the damn bezel and cluster!! I AINT looking fwd to that!
But all these rpm readings are from an accurate tach placed under the hood. I could run the wires thru the firewall for the good tach tho. I should that way I can get readings while driving. Same with vac gauge too lol
Hey Steve did u ever get the factory ya to read right. As u said b4 that at 60 or so mph u were 4000ish with 3.23 gears