On my '68 slightly-modded 302, I have a 4-row radiator working great but the water pump is now ready for the heap. Any suggestions as to what temperature thermostat I should use?
It really depends upon where your car runs temperaturewise under normal conditions. If it runs at 170 then a 195 thermostat will cause the sytem to constantly cycle and the temp will climb then fall consistently and I don't like this situation so I run a thermostat as close to and under the temp the car likes to run when there is no thermostat in the system and a restrictor plate is in it's place.