The push button 727s worked just fine, I had a 63 IIRC Savoy with 413 Max Stage II wedge with the cross ram an push button, I used to run it doen the track in the high 13s with street tires. Big lead sled.
Yep! Get some revs on the engine, then push the button a fraction of a second before the tree turns green. Those old Torqueflight transmissions could take a beating!
-Skip