Breathing new life into the 318 in the Scamp!
Crap I think it got too hot on you on break in.
FYI I started both my fresh engines on my test stand this spring.
Complete full gauges on everything tach, oil, water, volts, vacuum.
After break in the following is what I noticed.
The 360 with aluminum heads and 11.37 static and 10.71 dynamic would idle until it ran out of gas with no heat issues 190 max.
The 340 with iron factory X heads 8.98 static and 8.06 dynamic did not like to idle more than 5 minuates and the gauge was at 210.
My test stand has aluminum radiator and electric fan I know the mechanical fan will pull more air if shrouded but it is a safety issue on the test stand.