Part of the charm of squarebody Chevrolet pickups is their ruggedness. For their utility and simplicity, most people who gravitate toward the 1973 to 1987 generation of pickups expect a tradeoff in conveniences and comforts. Rather than accept that compromise, the Roadster Shop has introduced its Legend Series squarebody chassis, the first production platform for the custom chassis producer, and will offer the first truck from that series at auction later this month.
“We designed these to drive every single day like a new truck and to not think twice about using it,” said Jeremy Gerber, the co-owner of Roadster Shop with his brother Phil. “Everybody loves the old truck look, but people forget what it’s like to drive an old truck.”
Typically, Gerber and his crew build custom chassis for high-performance muscle cars and restomods, utilizing updated suspension technology and geometries to make them “feel like a brand new sports car,” he said. Seemingly every other car built for the SEMA Show or for the Ringbrothers these days sits atop one of the company’s chassis. The natural evolution of that approach, according to Gerber, is to apply it to pickups.
“The squarebody is the quintessential truck,” Gerber said. “They just don’t drive well, and that’s a limitation of the steering and suspension.”
Improving the Squarebody
So in 2017, Gerber tasked his staff of engineers with designing an entirely new chassis for the squarebody, one that would incorporate as much modern componentry as possible. Built from two-inch-by-six-inch .125-inch-wall rectangular tube, the frame carries over nothing but the body mounting points. Instead, its designed to mount a front differential and complete independent front suspension from a GMT K2XX platform Chevrolet 1500 Silverado, along with hydraulic rack-and-pinion steering, an LT-series V-8, an 8L90-E eight-speed automatic transmission, an MP3024 transfer case, and 13-inch disc brakes, all sourced new from GM. The 12-bolt rear axles, fitted with 3.70 gears and 12-inch disc brakes, hang from softer Deaver-built long-travel multi-leaf spring packs similar to those used on Ford Raptors. Specified for the chassis are custom two-piece aluminum billet wheels measuring 17 by 9.5 inches and designed to accept the stock hubcaps.
“This isn’t the chassis to put 5.13 gears and 44-inch tires on, then go bury in the mud,” he said. For that, the Roadster Shop already offers the solid-axle RS4 chassis.
Plans call for Roadster Shop to offer both rolling chassis complete with drivetrain and wiring and turnkey pickups using donor bodies supplied by the customer or by Roadster Shop. As of right now, Roadster Shop only offers the Legend Series in Blazer or shortbed wheelbases (106.5 and 117.5 inches, respectively), but “we are working on a Suburban chassis design, and we’ve seen a lot of interest in early 1969 to 1972 Blazers,” Gerber said. Engine choices will be either the 480-hp naturally aspirated LT1 or the 650-hp supercharged LT4.
Preparing for Production
While Gerber had Roadster Shop’s LT4-powered Legend Series test mule done by early 2019, he and his staff have spent the last few years putting miles on it and tweaking it in preparation for series production. In the meantime, He’s also started to stockpile clean, rust-free squarebody trucks with a little bit of patina to use as donors for turnkey trucks based on the series.
“We’ve been searching high and low for good examples of nice, original trucks,” he said. Because original shortbed K10s of that era are in such demand these days, he’s typically sourcing shortbed C10s from the southern and western United States. He said he has about half a dozen ready to go at this point.
(As a side note, Roadster Shop is not selling the turnkey Legend Series square bodies under the recently passed low-volume replica laws. Rather, they still wear their original C10 VINs and are being sold as any other shop would sell a restomodded or hot-rodded vehicle. However, “we are seeing some interest among replica manufacturers with using our rolling chassis,” he said.)
Serial Number 001
The donor for the first production turnkey Legend Series truck, however, came from right inside Roadster Shop. According to Gerber, a customer had already brought a clean Fremont-built 307-powered 1973 Chevrolet C10 to the shop, but didn’t like the color and instead found another. With the development on the test mule done and production of the chassis underway, the Roadster Shop crew began by lifting the Burnt Orange Poly truck’s body off the two-wheel-drive chassis and rolling the latter—complete with small-block, steering column, and brake system—away.
Gerber decided to keep most of the interior intact for the first truck after so many customers showed their appreciation for the original interior of the test mule, equipped with the same old blanket that covered the test mule’s ratty bench seat when it first arrived in the shop. “It was unanimous—everybody loved the character of the factory interior,” he said. That’s not to say the interior of the 1973 remains factory stock. After stripping out the original interior, the shop updated every mechanical aspect of the cab, from the Corvette door latches to the modern air conditioning system. They then added a layer of Boom Mat to quiet the truck before layering in insulating fabrics developed specifically for these trucks by a Detroit-area OEM interior provider.
The paint, Gerber said, remains 100 percent original. “All we did was wipe it down. This seems to be what everybody wanted—a finish that was old and distressed that they didn’t have to polish and keep nice.”
As with the test mule, the 1973 received an LT4 in its modernized chassis.
With all of the development work done, Gerber said it’ll take roughly four weeks to assemble the Legend Series trucks. Prices for the bare frames start at $30,000 and run up to $100,000 for complete LT4-powered rolling chassis. Gerber said he has 10 of the trucks going together at the moment and will “let the market decide” how many Roadster Shop will build rather than limit production to a certain amount.
The first production Legend Series truck will cross the block with no reserve at Barrett-Jackson’s Scottsdale auction, which takes place January 21 to 29. For more information, visit Barrett-Jackson.com.