I not gonna be by the car for a week or so and am unsure what WMS is but I'm assuming your talking axle flange to axle flange, I'm going off memory here but am pretty sure my housing flange overall measurement was 45" and I believe I added 2 1/2" for axles per side soooo..... 50" and my wheels are 17x11 with 4.5" back spacing and I have about 1" to the wheel lip, but I trimmed back the lip about 1/2" also. Hope this helps, I can measure next week to be 100% sure if you need me to.