I just double checked it and I'm still seeing 3.8125 for a 382S which I am 99% sure is a d60 carrier bearing race.
In case you aren't aware of this tool, take the blue pill and follow me down the rabbit hole:
Go to
www.timken.com . Click on "online services" in the upper right hand corner. Then click on "bearings online services" on the left. At this point, you will have to register, if you have not done so. It's not difficult.
Once registered, go to "Timken Bearing Product Dimensional Data By Part Number" and punch in a 382-S race.
... 3.8125 and it even references the 387A bearing cone for a d60 carrier.
That tool is significantly more powerful than
www.timkeninfo.com .
cmk
P.S. Hrm ... that 8" dim is a guess. I'll check on the exact length I would need. Or if you're privy to what I'm looking to do, you may be able to check it. I do have a feeling that it is > 6" though.