273,
In one of Vizard's articles/testing where he tested different displacements in SB Chevs, the 350 reqd a slightly wider LSA than bigger engines for best power. He does not have a 'fixation' with 106 LSA. All he said was that his testing [ 19,200 dyno tests ] found that cams sold by cam companies in general were on too wide LSAs for best overall power. From that testing emerged a computer program he sells & the 128 rule as a simplified guide for LSA rather than 'pick a cam' out of a catalogue.
