The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - L31 Vortec in a 66

**cwcarpenter98** · 10-20-2020, 03:25 PM

I purchased a sending unit from Letric Limited when I went from warning lights to a temp gauge. With a 180* Tstat, the needle is right about in the middle of the green. With a 195* Tstat, the needle will sit towards the H side of the gauge, but still in the green. I have not had any overheating issues with the truck.

On getting it to work with your engine, I'm not sure what needs to be done. For me, I had an intake manifold that did not have the correct size NPT threads. I took the intake to the machine shop that rebuilt the engine for my Dakota and had them drill and tap for the stock sender.

10-20-2020, 03:25 PM	#2
cwcarpenter98 Senior Member Join Date: Jan 2018 Location: Hickory Flat, GA Posts: 4,508	Re: L31 Vortec in a 66 - temp sending unit questions I purchased a sending unit from Letric Limited when I went from warning lights to a temp gauge. With a 180* Tstat, the needle is right about in the middle of the green. With a 195* Tstat, the needle will sit towards the H side of the gauge, but still in the green. I have not had any overheating issues with the truck. On getting it to work with your engine, I'm not sure what needs to be done. For me, I had an intake manifold that did not have the correct size NPT threads. I took the intake to the machine shop that rebuilt the engine for my Dakota and had them drill and tap for the stock sender. __________________ Christian Carpenter 1963 C10 - Frankentruck 283, Muncie 3 speed with overdrive Overdrive wiring here 1963-ish truck bed trailer - Half-Wit 1981 C10 - Penny 305, th350 --> Soon to be 350, Saginaw 4 speed 1995 Dodge Dakota Sport "I'll put it simple: if you're going hard enough left, you'll find yourself turning right." - Doc Hudson