>>>*Morning. I think this is the same one that I have been emailing back and forth for a few weeks now.
The issue is the rocker arms are cast, the rocker stands are cast, the head is also cast. Everything is machined and all mounting location are from the casting, we can see very quickly that moving from one part to another things vary.
The variance is builtin, with plus and minuses, and we see it all the time. It is nearly always harmless. Sometimes we see a situation where everything heads off one direction, this is called "stackup" in the industry, it used to be a terrible problem back in the old days. Neat things like a 427 Ford with a zero deck on one bank and .030" difference front to back on the other, the old 265" Chevy blocks that had the piston down on one bank and sticking out on the other. I have spent hours moving pushrods around on 390 Ford blocks, those came in 5 different lengths from the factory sometimes in the same engine.
Toyota is no different, and until the much more modern technology of today the factories did one heck of a lot of hand fitting.
99.9% of the time everything comes out within that plus or minus swing.
So.... we use a sheet of shim stock and modify slightly. In the case of the specs you give I would be thinking around .010" or so.
Personally, I would prefer as much of the rocker pad on the cam lobe as I can get and if the rocker arm adjustment screw never reaches the edge of the valve tippet, she will work just fine.
There is an old saying, "The man decides to sand his boat, but sands so well the boat won't float."
It's time to bolt her together and see how she runs.....*EB