finished bump stop spacers v 1.0.
These are 0.25" x 2" with 0.5" hole (maybe 5/16 would be more perfect
*EDIT*
I found a couple leveling kit install videos that show installing a bump stop spacer.
This video (7:37 for bump stop spacer) is installing a 3-1 (3" front, 1" rear) kit on a '16 taco. They have to use a ratchet strap to get the front back together to get the ball joint back in the LCA. It's a 1.5" tall puck, thus a 3" lift. kinda big, but like I said previously, seems like tacos use these big spacers often, and some FJs too.
ANYWAY, point here is that some of these "kits" come with a bump stop spacer, so it is a thing some kits are trying to address....
They also install a diff drop, I think that's because the overall lift is > 2" (is that the magic number in Toyota land IFS for dealing with axle angles?).
They also have skid plate spacers which must accommodate the diff drop. I think all these spacers are because of the extreme lift gained...
I've seen comments (here in mud and elsewhere) suggesting the shock can accommodate 1-1.5" from it's inherent safety margins. lift I still hold that a bump stop spacer seems like a good idea and I may just stay with my 1/4" instead of going up to the 3.8" I was going to build for v 2.0
Still, these are the low co$t "mall crawler" "parking lot hero" means of lift and I still posit that the mild 3/4" puck affording 1.5" front lift is a viable means of gaining ground clearance on a stock rig that sees off-road use. I still recommend caution with hard or extreme compression and also suggest spacing the bump stop down as insurance.
until I pull the trigger on an air-bag delete and real lift with concurrent suspension travel gain, I'll continue my use and testing of the 3/4" front puck which retains stock variable shock dampening.