Finoke, who's brand and where did you get the Tach from please, there are a few out there from $190-$590, I know you get what you paid for but,,,, $590 is spendy. I want to do teh same thing as you and others have done but will drop the Amp gauge in favor of an Oil Pres gauge, i just need to find someone who sells one read to go, Redline will only convert a gauge you supply, as I live in Au, that has alot of extra $$$$ added to it.