Rick, thanks for keeping this subject alive. I'm short on fabrication skills but I may have dug up something useful.
First, I have been staring at the 1929-1957 Master parts list (probably too long). Here is the illustration of the steering knuckle, etc.
http://chevy.tocmp.com/1929_57chevyparts/57cmpc0521.htm If you go to 6.311 (Bearing Assembly, Front Wheel Inner) and look for 3/4 ton you find it is comprised of 3 parts, one of which is 909626 for 1935-52. (Rick, there are your 1.406 and .843 measurements, 1.40 and .84)
http://chevy.tocmp.com/1929_57chevyparts/57cmpc0533.htm The part number of the assembly for 1935-52 is 909026. For our 1953-57 friends the part number is 909046.
I believe the same is true of the outer bearing at 6.313. For 3/4 ton it is comprised of 3 parts, one of which is 909625 for 1935-52. The assembly part number is 909025.
For 1953-57 the part number is 909045.
OK all of that to get to this. From reading previous posts about front wheel bearings, someone referred to this company in Japan that has measurements of front bearings.
http://www.mbs-m.co.jp/flame.htm If you click on front wheel ball bearings, I believe you will find the bore, OD and width in mm for the four bearing assemblies mentioned above.
1935-52 Inner bearing 909026, outer 909025.
1953-57 Inner bearing 909046, outer 909045.
Finally, I found a Dodge web site that offered disc brake conversion kits for WWII and later trucks. The man said he was retiring in 12/05 but was leaving his site up for a year. He was using some GM rotors and fabricating the hub assemblies and some adapters I believe. He has some nice pictures and parts lists. I offer it as an example of someone who figured it out for a different line of trucks but there should be some tips available for us. (We don't have to reinvent the wheel?)
http://uglytruckling.com/# Thanks again Rick for keeping the topic alive. I have a 52 GMC 3/4 ton, so I am interested in where this topic is going.
