If you know your E-Body history, then you know that only 2,165 Dodge Challenger convertibles rolled out of Hamtramck Assembly during the '71 model run. Factors such as high insurance costs for anything considered sporty, and air-conditioned hardtops and coupes-which led to dropping droptop sales across all of Ma Mopar's car platforms from the mid-'60s onward-are cited as reasons why the E-Body, and all of Chrysler's U.S. built car lines, went steel roofs only starting in 1972.

The majority of that last run of Challenger convertibles, some 1,800 or more, were built with engines better suited to grocery-getting than performance via the 225-inch Slant Six or the two-barrel-equipped 318. Meanwhile, fewer than 350 Challenger convertibles got either a 340 or 383, and any engine bigger than that was N/A as a factory option in 1971.

Back in 2003, we did an article with the Richard Nedbal-built fuel-injected Hemi that now resides under the hood of this Challenger. Since then, plenty has gone on-and in-it. "It's a big roller engine with an all Stage V valvetrain. Rich's company, FAST Man EFI, decided to utilize a new computer, with traction and nitrous control," Ed Sternfeld says as he lists the updates added over the past five years. "We added a 150-shot of nitrous that enters the engine through a Holley Race NOSzle, which is the little blue thing you see below each injector." With a dual-quad intake, plus other go-fast goodies. "It first dynoed at 680 hp on Rich's dyno on pump gasoline. Plus there's the 150[hp]-shot of nitrous on top. We made some changes, and now, the way it's tuned, it's got a lot more timing advance in it because of the E85 that it runs on. I figure it's pushing at least 700 before you get a hit of nitrous on it."

One upgrade did cause more than a few headaches during its fabrication and installation: a dual-pickup oiling system. "That just caused all kinds of nightmares after I'd done the engine in the car test-fit the other way. I could have murdered myself!" Ed says with a laugh.

Ed says that the deliberate pace that he took in building and updating this Challenger prevented what could have been a comedy of errors had this project been rushed-given how much of what went into it was custom-fabricated. "We took our time with it," Ed says. "When it was too hot, we didn't work on it."

Among the stuff that went in: a Keisler TKO 600 six-speed manual transmission and a dual-disc clutch; a Dana 60 rear end wearing a set of monoleaf springs; and CalTrac traction bars. As Ed puts it, "There's no sound system in the car-the engine is the sound system!"

The Challenger's interior is quite the place to listen to that 528-inch "sound system," at any speed. It's done up in pink-and-white leather, and Ed says the back seat was customized to look like the special-ordered Cobra buckets up front.

Outside, the originally B5 Blue-hued ride had been a California car since new, so its sheetmetal was free of rust, as well as major collision damage. It, however, wore the scars and "sunburn" that come with the territory after that long in the Southern California sun (and parking lots). Once the old paint came off and the body was prepped for paint, on went the Panther Pink at a place where the people should know a thing or two about painting Mopars-the body shop at Ed's own Dependable Dodge dealership.

Ed also says the choice of this particular inside-and-out color scheme was significant-in a big way. "The biggest things about the project were the body color and the interior," he says. "The ladies just go crazy for it, and they will probably let you spend your $150,000 if you build a car they actually like!"