How tight to set solid lifters

Nope. Post a video of you doing it. There is no way you can accurately set the valves with the engine running.

And, I’ve never ever seen a Pro Stock engine that had the valves set with the engine running. If anyone was going to do it, it would be them.

There is no way you can hold the wrench, work the feeler gauge and get the **** right and tight with the engine running, unless you let the engine run at 200 RPM. And I would never do that.
LOL I'm done.