Each year, the SEMA Show packs the Las Vegas Convention Center full of some of the world's finest custom cars and trucks, and the 2014 show is certainly no exception. Walking the show, we have come across some truly jaw-dropping works of automotive art, many of which feature restoration and performance parts from Classic Industries. And, since the show isn't open to the general public, we're doing our best to share some of these amazing rides with you..

Up through the 1960s, GM trucks were famous for their smooth sculpted lines and aerodynamic curves. Even though the 1967-72 models were a slight departure from the curvy styling with their beveled beltline, the C10 trucks still retained their sleek look into the early seventies. Then, in 1973, everything changed with the introduction of what soon became known as the "square body".

Over the course of the last decade, southern California has become what some might call "the land of the Prius". The region's beach cities, suburbs, and sprawling freeway traffic jams are always packed with tiny hybrid economy cars. As lovers of the V8 and classic American muscle, we sometimes feel a little rebellious roaring past the slow-moving hatchbacks, but we recently met someone who takes this counter-cultural spirit to a whole new level. Enter Donnille Leubner and his massive Chevy C3500 dually. If owning the road sounds appealing, this is the rig for you.

There's no question about it — one of the most important parts of any classic car project is choosing the right set of wheels. First of all, you've got to pick the right style. Do you want vintage rallye wheels, classic mag five-spokes, or something more aggressive and modern? Then, you've got to select the right bolt pattern and size, and make sure the offset and backspacing are correct for your vehicle. However, there's one more crucial point to consider before making your decision — wheel weight. A set of lightweight wheels can noticeably improve your car's performance.

The perfect set of wheels is an essential element of any classic car build, but choosing wheels isn't always as easy as it might seem. There are many technical variables that must be considered, including bolt pattern, diameter, width, backspacing, and offset. Once you've established the wheel specs you need, you'll have to shop for an appropriate set of wheels with an appealing design and finish. In this article, we'll provide some info and diagrams to help you answer the question "what are wheel backspacing and offset?"