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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| | | | Joined: Aug 2011 Posts: 154 Shop Shark | | Shop Shark Joined: Aug 2011 Posts: 154 | 1955.2 with a 350 from a 1978 Blazer, 12v system.
I sent my temp gauge off to be repaired and got it back. However, I can't find a coolant temperature sensor for a SBC that is electrical and will fit a 5/8 opening. When I put the engine in the databases of the FLAPS, it comes back with a sensor that is way too big for the hole. I really want to stick with my classic gauges so I'm looking for help from the stovebolt braintrust to come up with an idea or point me in the right direction. I will probably call Summit in the morning and see if they can help.
In the meantime, I'm running a new, mechanical gauge and have it mounted under the dash. But I really want to be able to hook up my classic gauge.
And I have the small round gauges, not the "V" style cluster.
1955 GMC 100 Series 2
| | | | | Joined: Feb 2004 Posts: 29,878 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,878 | The standard temp sensor for that engine has a 1/2" NPT thread and fits in a tapered-thread hole between the #1 and #3 spark plugs on the driver's side cylinder head. If the heads you're running don't have that port, get a thermostat housing with a pipe thread in it and install the sensor there. The later-model thermo housings also have a 1/2" NPT hole which can be adapted down to a 5/8" thread if necessary.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
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