Does this prove David Vizard's 128 lsa formula ?

273,
I don't know how many examples you need. Watch the Cattle Dog video again. DV has dyno examples in his books & also in tests done for magazine articles. He has consistently said that cams are generally being ground on LSAs that are too wide.
I would say Jon Kaase took his advice, winning the EMC with a cam that had a 98* LSA, 92* ICL. I suspect what made DV think/look at tighter LSAs was the Morris Mini engine, with which he has had a lot of experience. Even the stock low performance cam for those was on 107.5* LSA, & performance versions were even tighter. Those little engines punched above their weight...
Below is a test that was done loooooooooooong before 128 came to be a conversation piece, identical cams, 106,108,110 LSA tested.

View attachment 1716308523
Narrower LSA generally makes more mid range torque, no one in the world is arguing that it doesn't, how does that prove DV's claims that his formula always gives the optimal lsa #, and gonna get huge gains over off the shelf cams and be like him the 1%er of top builders and pick cams that get around 1.4+ lbs-ft per cid. And that narrowing the LSA while maintaining same overlap is gonna be even better gains. That's the proof I'm looking for the ones that prove those claims.

All those test prove that tightening the lsa makes more midrange torque and again who's really arguing it don't. It's like saying more duration generally gains hp, no ****.