So this reply is an experiment on trying to post a picture following instructions from the picture thread, as well as a comment on these housings. I have also purchased new bearing housings from IN Racing, and used them without modification. I have rebuilt several Ace/Aceca rears. I have plotted the hole centers of the bearing housings for the diff stub axles for original ("left/right" in picture) and INR bearing housings ("new" in picture). The originals from both my BEX298 and an early Aceca diff/axle seem to be based on a 2-3/8 bolt centers. The original left side/right side pin locations from the same and from different cars have quite a bit of variation. The new ones from INR seem to be something else entirely. As for the dowel pin locations, I am guessing the original is a polar dimensioning scheme rather than an ordinate, but INR might have been thinking ordinate in the translation when copying for CNC machining. Though neither way works out to be a homerun for those of us that like precision. The originals and the INR new ones both work, however, because there seems to be quite a bit of play from loose tolerances. INR supplies them from the shelf with dowel pin holes already drilled, while Gerry might have realized the variance problem so recommends custom from the beginning. If the INR off the shelf won't work, then I would simply ask whoever you decide on to make them (either INR or Gerry) without drilling the dowel pin holes and then have them drilled to match your diff case. If the photo sharing doesn't work, I can just email it to you off line.. Ian