Your local library should have repair manuals. Those should have all the info and diagrams you need. I prefer Chiltons but I'm sure Haynes works as well. The best would be getting actual GM Service Manuals but if you don't want to spend any money then hit up the library.
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1998 Pontiac Grand Prix GT
WizAired CAI, Impala 12" Brake Upgrade, ZZP Alternator Rewire and Voltage Booster, Rotated Dogbone Mounts, Kicker KS690 6x9s, JBL GTO427 4s, JBL P652S 6.5s
2001 Ford F150 XLT SuperCab
Stock, LineX, 212K