Reply to "Too cool?"

I've tested and use the Robert Shaw thermostats:

http://www.flowkooler.com/thermos.php

You'll see the Robertshaw series thermostat number 333 is the proper one
for a 351C, either 333-180 for 180 degrees F opening point or 333-192 for
192 degrees F. Here's a chart that shows wear versus coolant temperature:

http://carnut.com/ramblin/cool3.html

Either temperature should be fine. I prefer to run the 192 deg F thermostat
to make sure the oil gets hot enough to boil off the moisture but it you
have a marginal cooling system, the 180 deg F will give you a bit (not much)
more time in stop and go traffic.

Dan Jones