I had a bit of an adventure today. I have read this forum enough to know that finding the front wheel bearings on a 1949 6400 can be a challenge. So....did I have an extra set ready? No....Did I have the part numbers ready for my parts guy? No....Did I even bother to check the front bearing and repack them after I bought the truck? No....Ok, I'm an idiot. haha. Anyway, to make a long story short, the outer front bearing died while a friend was driving my truck. He limped it back to my shop and I tried to find a replacement outer bearing with no luck. I had to make something work because I had a four thousand dollar two post lift in the back of the truck and the truck is too long to park inside my shop. What to do? I removed what was left of the old bearing. Basically just the inner and outer race was left. I went to O'Reilly and started going through bearings trying to find something that was at least the same size on the outer race. I found that a National a-17 had almost the same size outer race, but the inner diameter of the inner race was way to big. I then happened to place my old inner race into the inner race of the new bearing. It fit perfect! So...With a idea in my head, I went back to my shop. For the life of me I could not find my dial calipers. I guess the new bearing outer race was about .020 over sized compared to my original bearing. With my 3.5 inch angle grinder I carefully ground down the outside of the outer race and then drove it into the truck's hub assembly. I cleaned and repacked the old inner bearing and packed the new outer bearing. I assembled it on the truck, the hub was loose on the spindle because the new outer bearing was too large for the spindle. I then slid on the old inner race and everything tightened up perfectly. I tightened the spindle nut until the in and out movement of the hub disappeared. I put the tire back on and went for a test drive. The truck drove......perfect! Now, before everyone jumps in about this being unsafe. I considered that before putting this together. Other than the inner bearing exploding I do not see how it would be possible for the wheel to come off the truck. I also plan to get the correct bearing as soon as possible. But.....if someone is in the middle of nowhere and facing a BIG tow bill with a problem like mine you might want to try this little trick. I had about ten dollars and two hours getting my truck back on the road.