The delivery man dropped two of these off today. I bought them on a whim, as they were cheap. They're an exact match for the old ones out of my steering gear. So, if anyone else has a 'SAGINAW GEAR 267977' steering gear, the 42-48 GM/Chevy COE truck is the same. Note: part no. GM#178479 is the race, GM#178480 is the bearing.
Thanks folks!
Owen.