WMS stands for Wheel Mounting Surface, the flat part on the hub where the wheel sits.

When putting together this tech tip
http://www.stovebolt.com/techtips/bigbolts/p30swap/
I measured a 48 2 ton front axle at 69-70" I'll double check this evening and should be able to get a more accurate measurement too. Perhaps I measured, remembered, or wrote it down wrong, what measurements do other folks get?

Grigg

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-