Rt side spindle 3402638

I'm doing a disc conversion on a 72 Abody. These are the taller spindles from late model B bodies as well as FMJ càrs. Perhaps "not everyone knows part numbers", but part of that is important when searching for correct parts you're looking as well as "paying attention".
The shorter A&E body knuckle is #3402626, close, but not a match.
Even number suspenion parts are for the right, while odd numbers fit the left.
I hope this information is correct and helpful.