Cam Specs.....where will the power be?

David Vizard tested 10,000 cam combinations for Crane cams. That testing, plus his decades of cam dyno testing showed patterns evolve. One was his '128 rule' [ look it up on the web ] & the other is a computerised cam program. The 128 rule is for determining LSA for parallel valve heads in general & works for CRs of between 9.5 -11:1. For splayed valve heads like the BBC, 131.5 is used instead of 128. Correction factors are used for higher CRs & blowers etc.
Until I can find someone who has tested more cams than DV [ no luck yet!] I have been & will continue to follow his advice.
In his Chev books, he says if you want a smoother idle/more low end, you do NOT widen the LSA, you reduce the duration. Yes, might be in a Chev book, but a Chev is just an air pump...like a Ford or Mopar.