Lynn That is your opinion
I have messed with these flattys for 60 years
and now my opinion is leave them out!
use to run a flat head in a ski boat ,pulling 6 skiers and the water out of the lake was pumped straight through and only run at 120 f and lasted over 20 years
so tell me were the temperature should be 120 or 180 or 200 and I have never heard an engine complain about being to cool just too HOT
