This week's Mecum Auction in Chicago is sure to be a hit with the Pontiac crowd. Up for auction are two rare Trans Ams, each crossing the block separately. The first is a 1969, which has been completely restored, and the other is a 1999 30th Anniversary car. Let's take a look at what makes each one unique and special.

The restoration of the '69 was completed in January of 2012 and has since won itself quite a few awards. It is one of just 697 produced and houses a 400 cubic-inch Ram Air III engine cranking out 335 horsepower. The all-numbers-matching 4-speed manual Trans Am has been correctly outfitted with a nitrous system and date-coded parts. During restoration, the completely rust-free and straight body was painted the correct Cameo White and Tyrol Blue colors and the interior has been given a fresh look with new blue vinyl and carpeting. Also inside are a Hurst shifter, wood-rimmed Sport steering wheel, and full gauges.

The 30th Anniversary '99 Trans Am was Pontiac Motor Division's celebration of the longest-running production muscle car ever built. To memorialize the 1969 version, the car is outfitted in a Blue-on-White coat of paint and has a strong muscular appearance with an equally beefy engine under the hood - a Ram Air-fed 320hp version of the Corvette's 5.7L V-8. Handling is improved by the WS6 performance suspension and larger 17-inch wheels, which have been specially painted blue and capped off with a unique anniversary emblem. The unique blue stripes on the hood and white interior with anniversary logos really set this special edition apart. Having a production number of 282, the car was originally bought in March 1999 with six miles on the odometer and has stuck with the same owner until now. He has only put 63 miles on it since he brought it home.

Both cars will be auctioned on Saturday at 3:30 and 3:35 p.m. respectively. Log on to www.mecum.com for more information.