Huck:
Ah! But you were talking MTOWs and not MLWs. We had 363,500 lbs for the DC-10-10 and 403,000 lbs for the DC-10-30.
Now while you are probably right about the freighter landing more often at MLW it was not unknown in Laker either for we were usually full (345 pax plus bags plus 10,000 to 20,000 lbs of freight downstairs).
I remember on one memorable occasion doing Los Angeles to London in 8 hrs 49 mins and at one point (around 30°W) contemplating having to dump to get down to MLW!