73/77 Chevy truck mech oil gauge install.

73 Z

Veteran Member
Jun 9, 2007
1,209
Los Angeles, Ca
Not exact, but close enough for stock appearing and not visually out of check.

Now just need an adapter m-2an? to m-4an, or ditch -4 line and use the plastic tube oil gauge 1.jpg oil gauge 2.jpg oil gauge 3.jpg oil gauge 4.jpg
 

Geno

New Member
Jul 6, 2003
22
Winchester, KY
So it's a factory truck gauge? Source? I assume you can't get it at the parts counter. I'll check eBay. My gauges are out now so this is a good time for me to do it.

Geno
 

garyandcindy

Veteran Member
Oct 20, 2004
1,655
cumming,ga-usa
I would start by getting the correct matching sending unit for the gauge.I think these changed some over the years so make sure it’s year matching.LMC Trucks has just about anything you need for a square body truck.They even have the gauge.
 

73 Z

Veteran Member
Jun 9, 2007
1,209
Los Angeles, Ca
I did the Mech gauge not Elec. Elec requires a sending unit; Mech requires engine oil prs at the gauge.

 

73 Z

Veteran Member
Jun 9, 2007
1,209
Los Angeles, Ca
Seems trying to find an adapter to use existing 4an line will be impossible, unless I'm missing something. I'll keep the 4an line going thru firewall and add a copper or plastic line as well. What are the thoughts of copper vs plastic?
73 chevy truck oil gauge adapter.jpg
photo of 73 truck gauge hook up, (smaller than 3an) and SW gauge hook up, (adapter to 4an). SW oil gauge.jpg
 




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