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Old 07-11-2018, 11:55 PM   #1
driller35
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1970 350 Temp Ports ?

I have a 1970 Chev CST with 350 Auto, AC and have a question on the temp ports on head , I know one is being utilized by the factory temp gage and I am wondering what the other one would be used for and can only think for the AC but am not sure , I want to be able to use port for Sniper EFI

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70 Chev CST, 350 auto, PS, PB, AC, tach
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Old 07-12-2018, 09:41 AM   #2
clay68c10
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Re: 1970 350 Temp Ports ?

Use the other port for your EFI, the AC didn't have a temp sensor input. Someone in the past may have just stuck a sensor in there to block the port instead of a pipe plug.
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Old 07-12-2018, 09:45 AM   #3
driller35
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Re: 1970 350 Temp Ports ?

Thanks Clay68c10, funny thing is though both are used and wired and both look to be factory , trying to follow the wires all lead into to the main harness
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72 Chev Cheyenne Super SB 4x4 350,4spd,buckets, tilt,tach,am-fm,extreme tow hooks,Canadian Model Production 1 of 52 SOLD

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Old 07-12-2018, 11:52 AM   #4
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Re: 1970 350 Temp Ports ?

The use of the two ports in the heads depend on your gauge panel. If you have the 7 hole gauge panel with actual gauges, the drivers side port is for the temp gauge. If you have the 3 hole panel with the dummy lights, the passenger head port is used for the temp light switch. Its weird that yours is using both locations...unless the PO hooked it up because he wanted to use both gauge and light
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Old 07-12-2018, 02:12 PM   #5
demian5
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Re: 1970 350 Temp Ports ?

I have one on each head and they are both hooked up as well. I have a factory temp gauge.
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