I'm converting my 89 7M-GTE to work with a 86 non-turbo shell. I'm having problems with the gas, temperature, oil and tach gauges. I was wondering if anyone has done the resistor mod to the NA tach? it's listed on this page http://www.4cefed.com/conversion.html
Here's the picture of it: http://www.4cefed.com/tech/natachchanges.jpg
Just wondering if anyone has actually done this, or thoughts on it before I try it.