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Hi Folks, first post here. I have a 51 Dodge B3 B I am putting back on the road after sitting for a good while in the Seattle "sun" (that would be rain BTW), At some point another owner decided to replace the stock rear end and install what I found to be a 56 Desoto rear end (1141544 68 and what looks like a "0" in a small square box on the rear end). Wheel hubs which are 12", were a bitch to remove as were the axles, Im using lots of anti-seize compound going back together. I bought brake and seal parts for the Fireflite and they fit it fine. As the inner seal was leaking on the rear end I ordered a new set of seals and as I was putting it all back together and cleaning the old grease out of the wheel bearings I found some really burned bearings and super gouges in the races on both sides, so new bearing time. I decided to look up new bearings on rockauto and amazon. I took the part numbers from the Timken bearing and race and plugged it in a search, said it didnt fit the 56 Desoto. A bit of looking on rockauto after measuring the race made me believe it might be a heavy duty rear end. Lord only knows and I hope someone on here also! So the removed bearings/race are numbered TIMKEN 25877 & 25821 which translates to a "Tapered Bearing & Race 25877/25821 1 Set 260" which I can find on amazon no problem. Now to me it seems like a no brainer here, get old part number from part, order new of same, install, go. But hey I confess Im geting old and you know beginning to second, OK third or fourth guess myself. Can anyone here shed any light on what the rear end is and if they have any thoughts on going with the same Timken part #s? Cheers and thanks for yalls help. Jonk