Gross lift is .748, net lift is .748 - .026 = .722. You should be able to check this with a dial indicator on the retainer. Now, during running all bets are off if you can't control spring motion (lifters lofting off the ramp of the cam and going higher than the net lift and possibly even the gross lift) OR pushrods flexing and not allowing the net lift you observed with the dial indicator.
Now, I could be completely wrong, I am no engine builder, but I have assembled some heads in the past and never had any problems.
Exactly! x 2 I have done alot of testing with rockers with the same ratio and they were all off, except shafts. Which one depends on how close they get you to the actual ratio. Always best to measure actual lift with an indicator at the valve after rocker ratio, against spring pressure and current pushrod. You will be surprised, you def get what you pay for with rockers.