1/4" shouldn't cause problems, you don't run your truck with the suspension at that angle all of the time or even often, right? It's just momentary. Might not hurt to be a little mindful of when it's fully extended.

I've been using the 5/8" (?) poly snubbers for years, stock height or maybe 1/2" of crank, no problems - not even a torn boot (knock on wood).

4x4Wire's Toyota Section
1995 FZJ80 LandCruiser - 3 locking diffs, +200k mi, JD HIR's, 285/75R16 Nitto TG's
Olde North State Cruisers