Good post. One slight correction is the split in his MP 29 & 14 was between the 4 and 5 iron rather than between the 3 and 4. An interesting side note...his Cobra driver was 43.625" and his 5 iron was 37.75" which used to be pretty standard at the time, but is short compared to most modern specs.
@klineka, steep and shallow tends to do more with two things:
Where the shaft points (out of either end of the club) relative to the target line: inside and it's "steep" and "outside" and it's shallow.
The relative angle of the club shaft. You could have the butt end of the club pointing a foot outside the target line, but if the shaft is at 80° at A5, it's still "steep."
Most examples aren't as extreme as that example. There's a lot of grey area. You can be "steep" and still hit a draw (Carl Peterson, perhaps), and shallow and hit a cut, too.