View Full Version : Tachometer Sending Unit Question

05-18-2007, 05:38 PM
I'm working on a 53 hardtop, and will be keeping it 6V with a 6V alternator from Randy Rundle. I want to put in a tach, and thought a tach from a speedster would make sense (being as those are stude 6V tachs). I found a speedster 6V tach with the numbers "760 AM 6V E2" on the back, and I also have an original wire harness that goes through the firewall between the tach and the sending unit.

The problem is that I have two different sending units that are both designed to fit on the distributor. The first has a 3 1/4" diameter smooth cylinder bakelite housing 1 1/4" high. It has the numbers "0762DD" on the top and has a set screw recessed in the top center of the spinning center post. The other sending unit has a bakelite housing that is about 3 3/8" diameter at the top and spans out to 3 5/8" at the bottom. Total housing height is 1 1/2", and the center spinning post is solid as you look at it from the top. It looks like this, http://members.cox.net/njnagel/tach.html , but there are no numbers on my second sending unit. I'm missing the brackets that extend the original distributor hold down tabs.

Can anyone tell me which sending unit, if any, is correct for the 53 delco distributer? I've tried to set these in the distributer, but neither one fits logically. I can't find any pictures of the installation. I'm considering just giving up and installing a 6V petronix ignition system, and searching for a new aftermarket 6V tach - although I haven't found one of those tachs either.

G. Howes

05-18-2007, 06:40 PM
If it looks EXACTLY like the one on my web site, you have a '56 Golden Hawk sending unit for an Autolite distributor. The Stude/Delco one looks similar, but obviously fits the Delco dist.


55 Commander Starlight

05-18-2007, 07:53 PM
Thanks, that explains one. The other looks like this: http://s66.photobucket.com/albums/h266/new53_photos/?action=view&current=tach.jpg

It seems to be too small for the delco distributor, but I can't tell since I haven't seen one in place in person. Did they use these tachs on later non-packard hawks? Were the later hawks using Delco distributors, or prestolite?

G. Howes