I set the needle bearings as close to the depth of the old ones. Is that correct?.... I have no idea and haven't found any specs on it. On the blind needle bearing, I just tapped it in and kept checking the gear match up as i went. Once the gears were lined up, i quit tapping on the bearing. I figure, i can do just as good and have (in my opinion) done a better job. After all, it's not a field repair, i actually care and the right parts are going in. I have the left side all cleaned, polished, buffed and shiny or STRAC. Once my new race bearing comes in that should conclude the work on the front axle assy. Then, put the engine stuff back on, run new electrical and pray the engine turns over when i hit the key. Come Nov 11, this should be the debute and USMC 324548 will be rockin'.