i don't know what pace setters actually look like. but IF the front pipe on the pass side, doesn't sweep back "up high" they won't fit,. its always the ac that gives aggravation,.if you go ac delete pulley etc,. or mount tha ac up high dr side ala corvette style,. then most F body headers will fit in the chassis,.
Wagon 95 gerry also put a set on a 9c1 for a guy,. after trimming off the front frame braces they fit very well,. i can't remember the name of them(long tube competition hookers come to mind??),. and that thread is pre-crash,.
Nick