Waking up an old thread I started, update, question.

Car has been running very good since the fix of my spark and carb issue.
According to my after market gauges, 180F t-stat opening like it should.
Temp around 190F in 30-65mph traffic. Stop-n-go temp around 200-210F

What bothered me the most, was the temp creeps up to 230-240F about 5 minutes after shut down.

Installed 160F t-stat. Gauge says it's opening when it should.
For all intents, same temps as with the 180F t-stat.

I had my 4-core radiator re cored, left the 160F t-stat installed.
Temps are much, much better overall.
170F in 30-65 .... 180-185 in stop-n-go.

But I still have a +40F temperature rise about 5 minutes after shut down.
Question .... Is the temp rise normal?

After waiting for the temp to rise, I start the car.
Engine cranks as it should, but is a little slow in firing/starting.
Ultimately, it does start, water pumps coolant, temp drops once coolant moves.
Question .... Is this a sign of vapor lock?
E-brock 1406 has a 1/2" spacer currently installed.

Thanks much...don t.