Does this prove David Vizard's 128 lsa formula ?
128 rule & the Hemi? DV has repeatedly stated that the 128 rule works for parallel valve heads with a 9 -10.5 CR. Better breathing heads like the 351C, BB Chev, Hemi, etc need to be bigger than 128. I believe he quotes 131.5 for the BB Chev. Similarly if CR is increased the 128 needs to be bigger.