Hmm, first off, thanks for your input. When you say "install a factory tach", are we talking a factory diesel tach, gutted and made to fit the montero, or are we talking a factory gasoline tach hooked up to the signal generator on the injection pump? I would love to figue out how to use the factory gas tach wired to the injection pump, as we are going to be doing quite a few of these, and that would be easiet and most economical. Is there anyway to get a direct link to the thread that covers this, or perhaps a name of the htread? I will look again, but looked pretty high and low on the archive for mitsu diesel conversations and did not see a topic that made sense as to covering this issue. Sorry, perhaps i need new glasses...