junkyard 396ss coolant advice

[Shirley, Mark R]

The water pump is belted to the crank pulley - is it tight?  1/4 -1/2in 
deflection at mid span?

Do you have a water temp gauge on it, and what does it read?

If your thermostat is set at 195, the engine will run 10-15 degrees
higher than this, unless your radiator is too low capacity, 
then it will run higher until the difference in temperature between
the radiator and the ambient is great enough to shed the heat the
engine is making.  Do not take the thermostat out!  It keeps the coolant
flowing so fast through the engine that engine heat cannot be transferred 
correctly to the coolant.

You probably need a new larger radiator.

The mechanic who leaned your mixture out to avoid 'dogging' the engine,
sounds like an idiot.  Leaner mixtures will cause the engine to run hotter.
Add fuel to cool the engine. 
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