It's a straight swap. I did however add 1/2" of spacers to the top and bottom of the engine mount only. The pass side looked a little low to me after the swap. One other thing, on my 2000 GS the power steering cooling section of the line hangs down and cips on the steel from between the mount bucket and the rear of the frame. The aluminum frame has a solid piece there. I allowed the line to sit in that flat area for the last 3 years and 60,000 miles. I've checked it a few times and planned to go with the police package (impala) 91c front mount cooler if it ever showed signs of wearing etc. So far..it looks good.
Have you thought about the rear suspension?
