Tom von Ruden was oly finalist and 4of them ran 1.46
Basicly as i recall 2-3 month off almost strictly 24*200 in 2-3 sets at 37-5 with 200jog and 400 set jog daily 100 striders , only one training a day.
Than nubers are cut pace were faster like 2*10*200at 32 etc.
All kind of sets but mostly 200 and a weekly time trial of 100-800m
Before race longer reps at acepace with walk ,ex 400-600s
And 200at fast with walk 200m and change of paces in sets like 2*8 at 30 than 4*200 at 25
Other training sess was 150s with 250 walk like 150 at 16-7s walk 250at 2-3min times 6
But the month of 200s at slower speed with jogs made them to do almost everything.
Other old school suff 1;46 guy did
400s w 200jog 70-64s thuesday 8-10 rep
Thursday 6-10times 800 w 400jog 2;30- 2;1x
Long run of 10 mile with4;5mile progressive tempo
Other day 5mile easy;49s quarter speed
Than 2 weeks of 6-5-3 w8 min @mile-800-400pace and other day 10-12*200 faster
Coach of him ran oly finals to back in 70s at the 1500, although he did up to 20quarters and 5*1k +5*800 and a 20-25k hilly run other days easy, ran 1;47 low too along with 3;36 and beat john walker in a race
Hope this helps