BBP 7 1/4 axle shafts
If you're plan was to pull a pair of SBP axles out and BBP slid in their place, you can forget that idea. As mentioned above, they're different length, different bearing, seal, retainer, backing plate, etc. If you just have a couple of bad shafts and need good ones, PM me with your shipping address and I'll get you a delivered price.
Thanks, Mark