Long Range Tanks?

[Kevin McDole]

My notes indicate the capacities of the various models are as follows ("usable" is a little less than these numbers):

1965 337 through 1972 337F
Standard: 92.8
Long Range: 131

1973 - 1974 337G
Standard: 92.8
Long Range: 125

1975 337G
Standard: 92.8
Long Range: 150

1976 337G through 1980 337H
Standard: 90.6
Long Range: 150.6