[GmFwd]

Gutting interior is not necessary but it helps a little. It just saves weight and gives you more room to haul tires/wheels with. Take out everything but the front seats dash console and door panels.

Differential... look it up. You have a lot to learn. It is one of the most important parts of a car. For drifting, there's not too much to it. But it plays a huge roll in handling characteristics in other motorsports. For drifting you need a good clutch type limited slip, or us cheap asses just weld up a open diff.

Go to clubloose.com and see when the next NightMoves is. It is a parking lot event that is great to learn at. Once you get better you can try the roadcourse.

I have nothing against street drifting if your smart about it. Late night, no population areas are cool. Populated street drifting is bad.