Um, the rear bumpstops prevent uptravel, ....not droop, so the shocks and brake lines, breather tubes, etc...don't need to be longer...if anything shorter maybe, but NOT longer.

Now, when you get the 3" SL on, you MIGHT have more downtravel...and need longer lines, etc...but that has nothing to do the with bumpstops.

(Front stops can limit upper or lower movement, but the rear stops just go between the axle and the frame...and only stop the axle coming up)

You have to be careful not to reverse arch your leaf pack too far...if the leaves are bent up by excessive uptravel...they can be stressed and that can lead to breakage.

When I did compression measurements, my leaves were flat with about 4" of space at the rear stop...so they would allow me a slight reverse arch, with that remaining 4" of space...if I got rid of them, it would be able to reverse arch even worse....

If you feel like it, as you're getting fat tires, knock the tabs on the rear stops upwards, so that they are not close to the inboard sidewalls...but leave the factory stops as they are position wise....

...And call it a day.