remeber the 489 has a crush sleeve. so if you R&R the yoke that is on it you will need to replace the crush sleeve and retorque to crush it...or you can roll the dice on it like some have done with so,so results. (just cause they get away with it does not mean it is the right way to do it.)

if he has it rebuilt,have them install a solid spacer and shims so the yoke can be R&R and just retorqued for seal change.

sounds like my luck working on stuff,i do it the hard way no matter what!