torque

OK, I had my SS All Weather Ranch rifle all nice and dialed in to shoot 1-1.5" groups at 100 yds from a rest, scoped, .045" gas bushing, rear buffer, Accu-Strut, trigger work, crown, bedding shims, etc. The gas block was retorqued when the bushing was replaced and hand tightened with a 9/64...

I couldn't find anything about this question in the previous posts, so I'll ask: I'm about to re-torque the gas block screws on my 580 mini 14 tactical, and I'm wondering how I'll be able to align the gas block once I go to put it back on the barrel. Are there indexing marks or some sort of...