He claims the 128 number is for inline wedge heads. I think I have it written down somewhere but it seems to me canted valve heads use 135. Or maybe it’s 132. Something like that.
IMO if you have actually tested 19,000 cams you’d have a pretty damn good idea what cam timing should look like.
I get it’s an LS but it’s still an inline wedge. I think some guys missed because they assumed that head would need less overlap like a canted valve head.
And I think some failed on exhaust duration. Reducing pumping losses is a big deal as long as you don’t get more overlap than you need.