the problem isnt the rear coil ejecting, that could be fixed with a little piece of metal over the end of the end of the coil. kinda like an upside down U to hold the coil there. the problem i think(not 100% sure) is that the driveshaft goes into the gas tank if the swap bar isnt there
I aint got no sway bar in the rear of my 91 4Runner. Driveline aint hit the tank yet and the springs are still in place. I guess if you decide to take the sway bar off, its a personal choice to risk things.
I pulled my rear sway bar when i did a 4" lift, the problem it lets the rear end have to much travel and ends up tearing the link mounts off the axel housing because the links dont have any way to twist and are stronger than the mounts. so far ive ripped all 4 damn near of if not all the way off. ive had to go in and gusset and plate everything to get it to stay plus my links are now chromoly with heims on top and johnny joints on the bottom. if i start wheeling it again its getting leaf springs or a redisned 4 link with longer arms and coil overs or air shocks.
if you do remove sway bar it will lean bad if you have a all-time-on locker (detroit, loc right etc). mine leans pretty bad and its on 37's so its always kinda fun to drive in traffic and freak people out