Amp gauge wiring

Replacement
Search in the for sale section here for 67 barracuda or 67 ralley.
For ebay etc prob best do it by the p/n which IIRC is printed on the gage face but may not be visible when installed.
IIRC 67 and 68 have the same face but 69 may be different. The speedo face is,
early 67 may have slightly different calibration - and to make this harder - new replacement oil pressure sending and fuel level sending units are not correctly calibrated. :(

Repair
Search for recommendations and experiences posted here.