The 246 and 315G I purchased/looked at were identical and neither fit. I saw that on the first round of parts O'Reilly brought in. The parts are just plain too wide by 0.100". NAPA is stumped (no surprise there) and O'Reilly's is trying a second round of U-joints. This seems to be a common issue with older drive shafts needing a u-joint with 2.125" between the machined surfaces of the Yokes and internal snap rings. I have located a few others on the internet but will see if O'Reilly's found one that works. Someone has had to have had this issue before and bought the correct ones, just trying to get the brand, store and part number that will work.

Thanks...Alan.