Here are some pics of how much wider the axle is. Depending on what tires and rims you have they will be different. I believe the axle is 1.75" wider total then the 7.5. Here are some quick pics.
I'm running 15x8 Procomp rims with 33x12.50 tires
Front of truck looking back:
Back driver side:
Well hope this helps. If you want a complete bolt on axle with no welding then get one from a Level II FX4 Ranger. Your still going to have drum brakes but you can still swap out and get Disc brakes.
Looking for another Ranger for the GF
2006 Mazdaspeed6 aka: SLVRBLT Daily Driver
2004 Ford Ranger aka: URBNRNR SOLD