I used Timken 28317 Cups/races and Timken 28156 Bearings Brattons numbers are cups/races 6090 and the bearings are 6070. You need two of the single cups and one double cup for the pinion. As an aside, I recently changed the gear ration from 3.78 - 1 to 3.54 - 1 and I couldn't be happier about it. The car runs a lot better. My next one will be 3.27 - 1
Terry