Paul,
I did have the wrong (modern) oil in it, but just managed to find a five gallon pail of the correct stuff on line. Yes, the whole underside of the truck was bathed in residue. I bought the truck in '61, so I have a pretty good idea of the history from that point forward. Prior to that, it was a county truck, and the county wasn't nice to it. I just spent about 4 years bring it back to pretty good condition. I rebuilt and installed a '58 235, but I might have erred on the rear main seal. That or a miss-calibrated dip stick might be reason for some of the oil residue, but I still think I lost too much out of the transmission. I have a sneaking suspicion this isn't the last time I will pull the tranny. Today, I'm going to try to engineer the cross-member to make it easier to remove. One step at a time. I will run the fill at least half an inch under the filler hole.
Thanks,
Gary
