4.2 lever? Like 2-2 1/4 turns out from 72 in.lb. If the pan is off, use a pry bar to pry the lever off of the pushrod and firmly apply the band. Measure the gap at the pushrod. Conversely, I think you could use air to apply the band and measure the difference between relaxed and applied at the pushrod. 5/16" is the number.

It's always interesting to use all of these alternate methods to adjust the thing. Then go back and mark the adjuster and go through it again using the 2 or 2 1/2 back from 72 in.lb. method, then compare where you end up.