ConcoursMustang Forums

1st Generation 1964 1/2 - 1973 - Questions & general discussions that apply to a specific year => 1971 - 1973 => Topic started by: 67foxgt390 on June 14, 2019, 11:51:50 PM

Title: 73 Mustang tach and guages. Want to upgrade
Post by: 67foxgt390 on June 14, 2019, 11:51:50 PM

  Hello, i recently purchased a 73 Mustang Conv with a Q code 351 and deluxe interior. The car does not have the optional tach and gauge package. I would like to add these to my car if I could. My question is can these be easily added to my car? Is this a just bolt them in along with the sending units or is this going to be involved like adding a whole different under dash wiring harness? I know the circuit board in the gauge cluster and can the tach be added separate from the gauges? Thanks in advance!!!

Title: Re: 73 Mustang tach and guages. Want to upgrade
Post by: midlife on June 15, 2019, 09:22:56 AM

While this is a concours forum, what you're asking for is not concours.  That said, you'll need to change your underdash harness, add the 3 gauge cluster and its harness, and to allow the ammeter to work, you'll need to change the headlight harness.  The dash cluster will need to be changed to tach-configuration as well.  RCCI offers a plug-in replacement 3 wire tach for the standard dash, using the standard dash cluster and its circuit card. 

I can modify the underdash harness, build you the 3 gauge cluster harness but cannot modify the headlight harness.  If you use the standard (non-tach) headlight harness, your ammeter will not have any signals.  RCCI offers a voltmeter replacement.  Right now, my services are down for likely the rest of the year due to repairs to the house/garage due to Hurricane Michael.
Hope this helps.