I'll have to measure the WMS to WMS. I don't know right off. I do know the spring pad alignment pins are off by 3/16" on either side. So I'll modify the hole to make them fit. I'm taking 6 of the 12 leaves out to soften the ride and lower it about 3 inches. I'm also going to leave the front axle in, take a few leaves out there too and do the disc brake conversion Grigg put in the tech section. That makes the most sense to me and seems pretty simple.