The LIM gasket isn't too hard to change, the part that takes the longest is cleaning things up. Just give yourself some time and work slow.
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1998 Supercharged Riviera - Custom CAI, Alpine spx-13ref, Infinity 6x9's, Alpine 4 Channel Amp, Kicker KX3, Silverstars, STB, Hawk Brake Pads, Monroe Air Shocks, KYB GR2