Welcome to the site!
Where in SoCal are you? I'm in SW LA county, along the beach front..
So to start with on that GT500.. you need a nice little 5.4 SC under the hood.....

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2003 Regal GS - the beater/daily driver - somewhat stock (yeah right). No its not a mustang, at least it's blown.
2001 GT Black on Black 5 speed
MM Strut Tower Brace/Weld-In Subframe Connectors/Koni Springs&Adjustables/Cobra Brakes/Cobra Rack/Tri-Ax/3.73s/SCT Tuner 56k miles