The Shelby has over twice the power of the other two cars and will have no problem facing the Honda and the Chevy. The Chevy and the Honda are pretty close. The Honda has got around 30 more HP, but and if it has a manual transmission will perform better than an auto, so theoretically the Honda will beat the Chevy. But depending on who jumps off the line first and driver experience it can change.

How would they fair against each other? Honda and Chevy?

You should have very little problems beating those cars.

How would the 2007 shelby GT500 fair up against a 2008 honda coupe and a 2006 chevy impalla.
2007 Ford Shelby GT500 Base Coupe 5.4L V8 Supercharger 6-speed Manual Features and Specs - Shelby specs

2003-2006 Honda Accord EX V6 Coupe - Modern Racer - Auto Archive - Honda specs

Used 2006 Chevrolet Impala LT Sedan Performance Specs - 2006 Chevrolet Impala LT Sedan Performance Specifications - Motor Trend Magazine -Impala specs.

Suppose these three cars lined up and went full speed for 30 seconds. What would go down?

Sure.

Hey would you mind answering one more question about cars

On a big track with wide sweeping turns, like NASCAR you would be fine, just slow down a little for the turns and get back on it on the straight away.

But for a precision track, vented disc brakes front and back, double piston calipers, stouter springs and shocks with some anti-roll bars to keep you level in the corners, some lower profile tires with good tread.

That's getting into some money but with that stuff you should be good to go.

But then again, I'm not an expert on chargers, so they may already have some of this stuff. When you get the car and get ready to get the stuff, perform some in-depth research on what you will need to get to make the car handle great in the turns.

What would I need to beat them in a regular race with turns.

In a drag race. Yes you could.

Could I still beat the honda and G35 with the 440 magnum?