correct thermostat

[jscott]

I see from a few vendors that the thermostat for the 351c requires attention when replacing.  Because the use of the restrictor plate not all off the shelf thermostats work, correct?   Here is a picture of my current one I just removed and two links to vendors thermostats.   Is mine ok for my 351c with the plate???

https://www.npdlink.com/product/thermostat-water-180-degree-high-flow-design-to/210385

https://www.tmeyerinc.com/product/high-flo-thermostat/

 

[Don C]

Yes, either one of those are correct for Cleveland engines. Did you verify that the restrictor plate is in place on your engine?

You can read more about the problem in this thread

 

[Stanglover]

For what it's worth, the one I use is a Stant 195* and looks like the one you took out. I will say that the "hat" barely closes off the hole in the restrictor plate, but I have had zero issues using that t/stat over the last 4 years it's been in there. Should I ever need to replace it, I may consider the high flow design, but the price puts me off a bit being it's US dollars. But, it's your dollars, you decide.

 

[jscott]

Yes plate is in place, probably go with a high flow, better to have what is best

 

[Carolina_Mountain_Mustangs]

The "high flow" thing is not needed If the flow is too fast the water does not have time to cool in the radiator. That is another reason you need 195 so the water has time to cool down. 
Here are two types both correct for 351 C it is the height that matters so that the end of the thermostat that goes out enters the hole in the baffle in the block. 
I found several NOS Stant 195 at an old parts house and bought them all.

I did have them pull a thermostat off the shelf at Advance Auto and it looked to be correct also.