Based on his writings, Mike favored inclines and dips over flat bench. He was especially big on dips, and he spoke at length to me about how he and Ray would really psyche themselves up to dip very heavy -- up to hanging 180 from their waists for reps. (When he said "psyche themselves up," I imagine that entailed popping Speed.)
That said, in an old interview, he was asked about some of his best lifts. He listed flat benching either 425, 440 or 445 for a 1 RM; I can't remember the exact number. He also said he singled 300 in a behind-neck press, and 10 good reps with 225 on the same.
I believe that, but I don't believe the 475*30 squat claim for a minute. Then again, that came from a magazine caption; I don't think Mike ever said anything about his best squat...Ray was the one claiming a double with 900 :/
I wonder if any of it is true? ABC use to have a program called the super stars where athletes competed in a bunch of different events like the half mile, 100 yard dash, rowing a boat; baseball hitting from a machine; bowling, obstacle course, weight lifting and other events. The weight lifting was a push press from squat stands. I believe Ferrigno got 300lbs with bad form. I think Mentzer failed with 300lbs. There is no way Mentzer was capable of a 300lbs PBN. Maybe in a smith machine with the bar positioned 8"plus higher than his traps. Ferrigno did well in the competition winning his preliminary heat against top shelf athletes but had some bad breaks in the final. Mentzer didn't do well at all. I remember the 100 yard dash and this was in his prime he looked like he just wasn't an athlete as every one blew by him. Ferrigno overall did amazing in the competition against football players, baseball, and other known athletes. I could be wrong on the time buy if my memory serves me he ran a 2:21 half mile. Fantastic for a man of his size.
The best moment in the show was boxer Joe Frazier competing in the swim contest. He jumped in and had to be rescued. He admitted he didn't know how to swim but figured he could learn during the competition. He nearly drowned.