Levrone didn't use any special routine or techniques. His triceps development was genetics combined with drugs and whatever degree of work. I'm not sure how hard he trained.
KEVIN LEVRONE'S TRICEPS MASS WORKOUT 1
EXERCISE SETS REPS
Lying triceps extensions * 4 6-8
Seated two-arm dumbbell 4 6-8
extensions 4 6-8
Cable pressdowns
* Prior to the working sets of the first exercise, do two sets, 10 reps
each, as a warm-up.
KEVIN LEVRONE'S TRICEPS,
MASS WORKOUT 2
EXERCISE SETS REPS
Close-grip bench presses * 4 6-8
Overhead cable extensions 4 6-8
Cable pressdowns 4 6-8
* Prior to the working sets of the first exercise, do two sets, 10 reps
each, as a warm-up.