No A/C...175 down the road or less....even with 180 stat....will go past 205 if I let it at idle in traffic after a while but I don't let it get over 200 at any time.
Om a side note I have been replied to with.."200 is low..I run mine at 230 all day" Now that are new engine stats..not old iron. My new vehicles do run at 220 but this is not the same system as 1967.
Define "after a while" also what is the ambient temp and other conditions like bumper to bumper traffic or ?.
Have you verified the readings with a thermocouple or RTD to a digital readout?
I have seen NEW "quality" gauges be off by as much as 40 degrees at the top end
