07-21-2019, 12:18 AM
I have a 351c in my 71 Mach1.
If you have the factory restrictor plate that is shown on the first page then you need a thermostat that has a "hat" on it, as shown here. The hat blocks off water flowing into the block and directs it to the radiator. Most parts stores dont know the difference between the 351c and 351w.
https://www.flowkoolerwaterpumps.com/col...thermostat
Here is a substitute thermostat without the hat but the restrictor plate and thermostat are made so that the bypass is still blocked off.
https://www.flowkoolerwaterpumps.com/col...s-bypass-1
As mentioned, you also need a good water pump and radiator in the system.
If you have the factory restrictor plate that is shown on the first page then you need a thermostat that has a "hat" on it, as shown here. The hat blocks off water flowing into the block and directs it to the radiator. Most parts stores dont know the difference between the 351c and 351w.
https://www.flowkoolerwaterpumps.com/col...thermostat
Here is a substitute thermostat without the hat but the restrictor plate and thermostat are made so that the bypass is still blocked off.
https://www.flowkoolerwaterpumps.com/col...s-bypass-1
As mentioned, you also need a good water pump and radiator in the system.