ok then, make an extension for your bump stop, its not hard they unscrew. so you can make a spacer that screws in where the stock rubber stop was, than screw the stock rubber to the spacer. make a pipe bomb with a bolt at one end and a nut on the other.
just pull the spring out, hook the strut back up and dry cycle the susp to full stuff, that way you can see how much longer you need the bumpstop to be, so the strut does not bottom out. alot of suspension lift kits come with bumpstop extensions for this reason....
i still need to do it to mine. i have not had the issues you have tho (yet) I always moniter the "dirt" line on the shaft (hehehe) to make sure im not bottoming it out, so far so good.
the front ends on these trucks may need a bit more tweeking than the sidekick ifs, but i think we can figure it out.....
-Lance