Typically the rear housing is cut to center the pinion and two different axle lengths are used. Been a while since I cut one but I think it was around a 2" difference. If it were mine, I would cut it to center it. The other option is to use the Strange 12 Bolt center section, if you have to buy one anyway.It may be OK offset, but if this is a race only car it's better to get everything lined up.