Fuller FS4005/NV4500 Trans Question

[Obsolete]

Looking into picking up a box truck and ran into this. I am looking at an 88 C6000 (old U-Haul) and a 96 c3500. Might end up with both.....anyway, the 88 is a 366/fuller and the 3500 is a 454/NV. From what I can find, the max torque ratings are 420 for the fuller and 460 for the New Venture. Hard to believe that the NV4500 is really a heavier duty transmission than the Eaton Fuller. My numbers for the Fuller came right from Eatons web site and I found the same rating for the NV in a couple different places. Not too many people crying about their Fuller transmissions breaking, the NV4500, on the other hand.........