Group Five Limited Challenger Speedster

There are certain to be dozens of variations of Challengers at this year's SEMA show, some will be versions that Dodge may not be interested in producing. One of the biggest is chopping the roof off, which Dodge won't do because of cost and weight considerations.

But for the lovers of open air motoring, anything can be done. We already reported on one converted 'vert from Coach Builders LTD, and now we bring you sketches of a second one, from Group Five Limited.

This Challenger 'vert comes sans top and with a cut-down windshield for that classic "speedster" profile. Other body mods clean up the front and rear fascias for a true shaved, custom look.

638-horsepower Pontiac G8 GXP Street Concept

The best part of SEMA is getting to see the cars that manufacturers come up with that may not necessarily ever see production. Take this G8 GXP Street Concept, for example. Sure, the 415-horsepower 6.2L V8 in the standard G8 GXP is plenty good enough, but why not stuff the new LSX454 crate engine from GM Performance Parts underneath the hood? The 7.4L V8 is good for a ZR1-matching 638 horsepower and 600 lb-ft torque.

Other features include stiffer springs and the brake package from the CTS-V as well as 20-inch black chrome wheels. The exterior has been given an aggressive makeover with a new front fascia with unique upper and lower grilles and a rear fascia that incorporates a diffuser and performance exhaust system. Inside are custom leather seats and a new gauge cluster.

How's that for Pontiac Excitement?

Ford Mustang SEMA Roundup: Grant Industries

The Annual SEMA auto show is coming fast. Set in Las Vegas on November 4-7th, there will undoubtedly be tons of musclecar variants on display, most highly modified and showing off the latest wares from aftermarket manufacturers.

As one would expect, there are going to be tons of Mustang variations. We'll be breaking them all down for you over the next couple of days.

1969 Ford Mustang by Grant Industries

Powertrain/Drivetrain Type and Modifications: Mustang GT500 KR four-valve V-8 engine; Kenne Bell supercharger and intercooler; AFCO headers; Flowmaster mufflers; FAST engine management computer; Optima battery; AFCO radiator and heat exchanger; Tremec six-speed manual transmission; Ford Racing Hurst shifter; Ford 9-in. differential

Chassis Type and Modifications: Ford Mustang chassis; Heidt's independent front suspension and four-link rear suspension; AFCO coil-overs; SSBC four-wheel disc brakes; Big Bite cross-drilled rotors; Modern Muscle 19- and 20-in. forged multipiece custom wheels; BFGoodrich tires

Exterior Modifications: '69 and '70 Mustang body parts integration; Standox Color custom paint

Interior Modifications: '06 Mustang GT500 KR dashboard, seats and console; Vintage Air heating and air conditioning; Sony audio/video entertainment system; Grant steering wheel; Electric Life power windows; American Auto Wire harness; Cool-It mat