That's what I used to do, but the Hellwig kit is the same $$ and a whole lot better. It just takes a bit longer to get the parts if you don't have a local 4X4 shop.
Plus, if you measure your required legnth while the car is on ramps, you can call Hellwig and they will give you all the part numers you need for a custom size. Say you put in Eibachs or other lowering springs. The stock legnth end-links will NOT be at the proper angle anymore.
Plus, you get a more accurate bar response from the Hellwig kit over other brands. The car will ride smoother as the bar reacts immediately instead of a slight transition before the bar reacts. It will corner flatter as well, and if you have a large rear bar, the rear will not have a tendancy to 'snap oversteer'.
This is my personal experience after several different kits, breaking the OEM ones several times in the process, putting up with clunking Addco and Energy Suspension busings due to them deflecting, and in general being miserable with the rear suspension.
"That's my story and I'm sticking to it!"
TankII