There are two bolts on the back side of the plate, for the two locations you all refer to, not related to mounting, that squash the plate from behind.
I’d select a 195° thermostat to make sure I boiled out any condensation in the crankcase, As well as getting proper oil flow to keep the bearings cool.and now I need advise for a recommended thermostat. I see 160 and 180s...no brand recommendations found yet...any tips here?