The t-350 valve body is cast iron. Warping the v-body is difficult. The threads would pull from the aluminum case first .
An inch pound torque wrench would be handy. Or the "gentle touch" as someone posted. I have not used a torque wrench on a t-350 in years
I would run a large flat file across the v-body to check for high spots.
Lets keep a level head when responding to information posted on this board.
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.