AutoMeter diesel Tach #2888
I'm running a nice Autometer diesel tach (5000rpm max), pn# 2888, and it works great. It is fed off of an impulse feed wire that straps onto the alternator. Pretty slick, only tricky part is that since there are different versions of alternators you have to have the tach calibrated. The back of the tach has a little dial switch that lets you fine tune the needle - I went to my local diesel shop and they had a portable temporary tach that just clips onto the front of the engine and you can hold it in your hand, run the engine, and dial it in. Works slicker than snot and looks great. I have a pic of it in my gallery - not sure how to link it directly, sorry.
Hope that helps.
- Sam