I guess the other thing worth mentioning which always seems to crop up in threads about torque wrenches is that if you are going to use one you need to do all the other steps that go along with using one. The torque settings specified are for clean threads on both the bolt and the tapped hole, and sometimes are specified to be used with oil, antie sieze or dry. If there is no spec then it's generally dry. All of these variables change the torque you will need to use. If you intend to use a torque wrench then you also need to buy a (non thread cutting) botoming cleaning tap for cleaning out the threaded hole, and clean the bolt out then clean both with a solvent and spray off with compressed air before applying the appropriate type of oil/antisieze if specified by the factory.
It gets a bit silly, but that's how pro shops do their engines. I'm talking car engines here, not chainsaws. I do my head bolts that way, but not most other non-critical bolts. Head bolts on cars I own are in the 50+ year old range though, so they're pretty far from original condition generally.
Shaun