So W7's reporterd valve lifts work out to:
.480 / .344 = 1.395 True ratio stock rocker, paper ratio 1.5
.512 / .344 = 1.488 True ratio with the 1.6 paper ratio rocker

Here's where the LA lifter orientation bites us. The lifter doesn't point at the rocker end, and the result is you get less lift than you think you should. The factor is the cosine of the included angle.
I remember a few years ago RobbMcC was a board member and he asked the question should he make his design for the new Erson rockers for LA be the ratio of just the rocker, paper ratio, or should he make the ratio larger than advertised to take into account the weird geometry. He had to go past 1.65 to get a 1.6 ratio between valve lift and lobe lift.

One thing that the stamped rockers have over their sexier brothers is less rotating mass. The extra inertia of the beefier rockers requires more valvespring to maintain the same max rpm. This has been noted by Steve Dulcich and others, a set of stainless roller rockers subtracted about 500 rpm from the stock flimsy rockers' redline.

So what we need is a 1.65 paper ratio stamped rocker with the top over the shaft closed in to give the rocker some more stiffness with little added moment of inertia.

R.