Green Loctite High temp thread sealer on the thread insert for safety if you are worried. Then just assemble as normal. The coolant won't ever make it past the gasket anyway.
I would be more worried about the cylinder bulging. A quick power hone on that cylinder should be considered using a torque plate. Not necessary unless you are worried about ring seal on that cylinder. You would not believe how bad cylinders distort when honed without a torque plate then checking them with one bolted and torqued in place.
Small block Chevy's you can see every bolt hole in the bore after running the motor when bored and honed without a torque plate. Its only one bolt you may get lucky. So you have to ask yourself. Do you feel lucky?
