Do you guys know if there are any performance differences between the b-body housings, for example, I got one out of a satellite and it has the puny 741 center section in it. I will be putting my 489 center section in it but was wondering if there were any difference in the actual housings, or are they all the same ie axle diameter, bearing size, etc. Just want to know before I put any money in this one I have. Thanks