Kas:
I run a fairly streetable 427 Sideoiler in my Kirkham, and, like yours, it will run up to 85 degrees celsius (185 degrees Fahrenheit) before my 16" puller fam activates. At speed, it will drop to about 80 and stay there. In traffic, about 85 - 90- still well within safe range. In my car, I am running a 50/50 coolant mixture, a 185 F thermostat, and a 185 F activation switch in my expansion tank that activates my puller fan.
Sounds like you are okay, but you may want to change over to a 185 F fan switch so that it activates a bit sooner.
My .02 cents worth.
Bud
