If it is a new block should have the line hone checked on it. I have a Merlin II block also. When i got it 10yrs ago the shop did the basic stuff on and the mains were TQed at 100lbs. Last season i had some other stuff done at the same shop and the tq when they were done this time was 90lbs. But if you are not having any work done like checking the main bearing oil clearanceing and line hone , I would tq them to 110lbs which is a factory tq spec.