I am completing a turbo coupe to a "408" and wonder how you folks resolved the wiring of the stock tach to read correctly with an 8 cylinder engine? I am running a MSD digital ignition.
Hey Charles hows it coming along? I think it all depends on what year cluster you have. This should help some.
http://www.coolcats.net/tech/advanced/4to8tach.html
It's slow going as I only get 1 day per week to work on it. The motor and transmission are installed with a complete magnaflow exhaust. I am having some driveability problems(surging at idle) but I am checking the calibration on the mass air meter. I was hping to use the stock hood and I bought a Roush hood scoop, but the TPS is still too high. I will send pictures when it is completed.
Yeah I'm having hood problems as well. I didn't start it yet but I put the upper on the other day and my hood is about 2-3 inches from closing.