Based on his extensive use of a white board and his dumbed down approach,it definitely appears that he is an instructor or teacher which may unfairly immediately open him up to the disparaging cliche of those who can do those who can't teach,and while I wouldn't characterize him as a chevy guy,his characterizing a C8 as a low riser and a C4 as a med. riser identifies him as at best being casually acquainted to the FE engine.While his math may accurately account for the quantity of air flow it in no way accounts for the quality of air flow which some of the preeminent builders would say is as important.I could see that video as being useful for first year students hat don't have much experience with FE's and at least its not using sbc's as an example.