Upgrraded endlinks are definitely recommended as the increased stresses on the stock ones will kill them quick.
I have made sets of them for other CEGer's with Aussi Bars before, for $65 a set, which includes everything to replaces the stock endlinks. Once again these are only for the rear swaybar, and simply changing them one a stock setup won't yeild much of anything other than peace of mind.
2000 SVT Turbo 295hp/269ftlb@12psi
#1 for Bendix Brakes Kits!
Knuckles rebuilt w/new bearings $55
AUSSIE ENDLINKS $70
Gutted pre-cats $80/set
A lack of planning on your part does not constitute an emergency on mine!