Yes I’ve done that many times. I guess I need to redefine my question. Now this is going on bad memory but..
Find the peak of ex and in then that is the centerline? Assuming both are the same not a duel pattern. Or are all just centered off the intake, .050 up and .050 down to get the centerline? I’m thinking one would need to know the exhaust also to see where it was ground? I don’t care where they close or open just that I’m not sticking it at 104 and supposed to be 115