You can also use one of these engine support bars. I got mine for $54 on amazon.
'04 GTP Comp-G - 14.871 @ 93.30 (6600 ft DA) - 3.6 MPS, SD headers w/ high-flow cat, Gutted stock airbox, Transgo shift kit, AL 104s, 180 tstat, GMPP front sway bar, poly control arm bushings, Tune by Dyno Brian