Lost my Fuel and Temp Guages at the dash in my 67 Dart

The gauges ARE NOT FUSED. The power for them comes off the (EDIT) Q2 black ACC accessory feed from the ignition switch, up to the cluster, and then goes through the IVR or instrument regulator.

IT MAY BE that the dash is suffering a poor ground, or just poor connections at the harness connector for the clusther (the board connector(s) which is VERY common. The pins of the connector come loose and corroded at the board and need to be soldered.

Try tightening (careful) the dash mounting screws to see if that makes a difference

WHAT ALL WAS wrong with my 67

1....Cluster pins were loose and in 2 cases broke. I actually just soldered wire leads to the PC board traces and converted to a couple of Molex style connectors
2...IVR was iffy and bad, replaced it with a solid state one
3...Contacts on the board where the IVR fits were not making good contact with the IVR. You must solder jumpers from the board traces to the contacts
4....Gauge studs were loose/ corroded. Replace the gauge stud nuts with real nuts, and tighten/ loosen/ tighten them a couple times to "scrub" the board traces clean where they contact
5....Ground. This is a problem. OEM clusters were grounded (poorly) by the mounting screws, and now these are so old, that rust/ corrosion has taken it's toll. Fasten a ground to a common point on the cluster, and bolt it to the dash frame or cluster support.

BE CAREFUL when working under the dash. Fuse protection ESPECIALLY on the older cars is poor, and there are circuits that ARE NOT FUSED, other than the main fuse link, which is poorer protection yet

NONE of the ammeter circuit is fused, the ignition switch power, or the main power to the headlight switch. DISCONNECT the battery ground when you are under there, unless you have "rigged" it carefully to make a test.

If you do not have a manual/ diagrams, go over to MyMopar.com and download the manual and also go to the wiring section, and download the 3rd party diagrams. These are NOT factory, and sometimes leave out details, but can be an aid to following circuits.