How far should the yoke stick out?

Thanks guys, I bet it's the boot since it got rebuilt and was changed out. It could be a little less than 2" but I'm just going off of memory. I have a spare yoke here and the rusty part is much shorter so I wasn't sure if it was right or not.

If it's not the boot thing, then it must have something to do with Treblig's tallywhacker.