Dan, I don't have a tach installed in my LeBaron at this time, but I am partial to VDO gauges. I've used a few of their tachs with good luck. They offer one that matches their Cockpit series of gauges that has it's own housing. Sorry, I don't have the part number handy. It's under $100 (possibly below $75) and installation is pretty easy. It comes with a bracket designed to clamp onto your steering column by using a large hose clamp like on e for a clothes dryer exhaust hose. I'd recommend putting something under the clamp to keep it from scratching the column. Otherwise you can calculate estimated highway RPM by using the tire diameter, rear gear ratio, and MPH. I have a spreadsheet I setup with the formulas. If you e-mail me direct I'll send it to you, or if you like send me your tire size and rear gear ratio and I'll punch those values in for you and send the results. Rob McCall '67 LeBaron -----Original Message----- From: mailing-list-owner@xxxxxxxxxxxxxxxx [mailto:mailing-list-owner@xxxxxxxxxxxxxxxx] On Behalf Of dansgarage@xxxxxxxxxxxx Sent: Tuesday, September 12, 2006 2:10 AM To: mailing-list@xxxxxxxxxxxxxxxx Subject: RE: IML: Overdrive & a Tach Hi All....I would like to know just how hard my IMperials are working when we are moving down the road at 50/60/70/80/etc. Since the RPM's generated by the 440 in my two '66's would be the same (more or less) on a day to day basis (depending on how many people I am carrying or how many bodies I have in the trunk - just kidding!!) I am thinking of putting a temporary Tech inside to see just what the engine is doing while I am going down the road or up the hills. Has anyone tried doing this? and if so, what kind of a tach did you use? Since its only going to be there for a short time I do not want to spend tons of $$$$ on the tach but I would like to get an reasonably accurate readout. Its not for racing or anything like that. Even I know that 3-ton vehicles do not make good racers! But my daily-driver SUV has a tach, my last 3 old dailydrivers had them and I guess I am just used to seeing how the old engin' is running on a 'whenever' basis...no other reason! So, if anyone has their 2-cents to add let me know....someone may already know the RPM's for various highway speeds for my Imperials (1966's with the standard 440 engine - 1 convertible/1 LeBaron with [I believe] standard rear's) and if so please email me directly (dansgarage@xxxxxxxxxxxx) Thanks all! Dan Melnik ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm