What thermostat to choose for 350 and quadrajet

[kikkegek]

guys,

my 350 seems to be running rather cold! about 145-150F.

the thermostat is closed at cold start, I checked that, and after a couple of highway miles it has opened and I can measure a temperature at the thermostat-housing of 165F.

I have been searching the internet and found:

ACDELCO says the standard thermostat is 195F for my engine

and I find some topics on other forums that state that the normal operating temperature would be 195-210.

is this correct?

what is the standard operating temperature of a SB 350

btw, I live in the Netherlands with an intermediate/sea climate. normal summers and winters.