The workout was 3 consecutive days per week, not 6 days per week.
The 3rd day was always the heaviest day, and it often was the day before a meet.
we've done 4 straight and 5 is possible but not necessary.
The full workout can be completed in about 75 minutes or less. A significant portion of that time is taken by the 5 minute rest time between sets.
(the reason for 3 consecutive days? It fit my schedule at the time but it also shows the minimal need for recovery)
Squats are counter productive to this workout for several reasons
Bodyweight and mass increases do come from diet, but also from a workout that causes increases in mitochondrial fluid--the result of most of the workouts I've seen, and used, over the last 25 years or so.