Yeah not always, but it was safer this way.
But mine did end up with the same length of reveal on the slip yoke, so it worked out ok. When I pull it to balance it, I'll likely remove an inch and have the perches in the flip kit drilled to re-center it.
That's if I keep the truck. I'm vastly unimpressed with the stuff that gm does these days. I can fix it all with enough $ thrown at it, but damn. GM does not use their head for shit.