27 11/16 is stock SBP axle for an A body 8.75.
The length is LONGER when you go to a LBP axle because the standoff distance from bearing to axle flange is greater. The standoff is about .400 or roughly 3/8" greater.
so if you do some rough math 27 11/16 + 6/16 = 28 1/16 so the new LBP axles would be ~28" long.
None of this " math is hard" stuff applies if you are using SBP drums and redrilling them to BBP.
Want to buy axles, call Dr. Diff. He's got good axles that will be the proper length and service is second top none! His BBP axles with long studs and green bearings are around $340 delivered.
