heating up a little more

fklskv said
You should be going to a colder plug.

https://www.autolite.com/docs/defau...ing-spark-plugs/autolite_heat-range-facts.pdf

Based on what? He didn't include enough information for a plug recommendation. You would need static and really dynamic compression numbers for that.

Bob, you didn't include how hot it's running now and when it runs as hot as it does. Idling? Driving down the road? Throw us some bones here.