My 422 smallblock build

Sounds like your net ratio is very close to 1.5.

Better than I would have expected.

(Theoretically, in order to get .600 lift, you’d have to have the lash at zero)

Btw, Smith Brothers makes some very nice adjuster screws.
They might be a little better than they were originally. Since I had to restore the radius on the rocker tips anyway, I cut the fulcrum length slightly longer so the rocker would center on the valve tip a little better in his application. That would have the effect of a very modest ratio increase, but I figured it would still be below advertised. Looks like it worked out better than expected.

FWIW, when I order from Smith Brothers, I specify USPS priority shipping. For all the troubles I have had with the postal service, they are cheaper and faster than UPS or FedEx when shipping across the country. UPS and FedEx will put the package on a truck and drive it the whole way. USPS used to have a 3 day guarantee on priority mail anywhere in the US. They will put it on a plane and get it to Pennsylvania in roughly three days, for about $10. I just got a set Thursday afternoon that were ordered Tuesday morning.