I have an 89 Heavy half GMC p/u(1/2ton with a light 3/4ton rating with the 14SF rear 6lugger)... Anyone know how wide it is from WMS to WMS? I wont have a chance to pull the wheels soon and needed to know. I may swap in a 14FF and need to know if I should go with a regular width 14FF or a van width... Just by looks, this newer body style looks like the axles are a little wider. Thanks!!!!!!!