You can go to Timken and search their catalog by vehicle or bearing number.
http://www.timken.com/industries/automotive/autoaftermarket/timkencatalog/PartCatalog. I spent hours trying to find tapered rollers for my '57 and avoid paying over 100.00 for a set. I figured it all out, and found a website for a firm in Japan that makes the inner (outer is 70's camaro) but I couldn't find a retail outlet, except a guy in Georgia that wants as much as the resto shops.
I think the AD and TF 1/2 tons use the same front wheel bearings. I ended up buying a set from CPP during their December Ebay sale. White Box with no ID or numbers on the bearings. If you want std ball bearings, try FLAPs or Napa. Outer is a B01 and I forget what the inner is. I'll try to paste my TF bearing links: BCA is some sort of industry standard designation. TF use a BCA# B01
http://forums.corvetteforum.com/showthread.php?t=1177441 (see c1 bearing source)
http://www.mbs-m.co.jp/page026.html http://www.mbs-m.co.jp/ http://www.mbs-m.co.jp/page039.html http://www.ntnamerica.com/NTN-BCA_Wheel_Bearing.htm All the big players in bearings make BCA bearings. MBS are the only guys I found making the inner in a tapered roller.
Good Luck
