When the Owner Builds His Own Truck: Duramax Swapped Squarebody @DMAX_Squared
When the owner of Kryptonite Products builds a truck for himself, you can bet every component underneath is going to be done right. Mike's 1987 Chevrolet R20 is exactly that, a Duramax-swapped squarebody built in-house by DmaxStore that doesn't cut corners anywhere, least of all in the suspension and steering.
The Build
The heart of Mike's R20 is a 6.6L LBZ Duramax paired with a DmaxStore-built Stage 3 Allison 1000 six-speed. A Garrett stage 1 65mm turbo, WC Fab intake setup, and Bosch CP3 injection pump make up a drivetrain built for reliability as much as power. The axles come from a 2006 Ford F-350 — Dana 60 up front, Sterling out back — both running 4.11 gears and Detroit Truetrac differentials. It's a package built to handle real torque day in and day out.

Out back, Deaver four-inch leaf springs are paired with Pacbrake air bags and Fox 2.5 Performance Elite shocks, giving the truck the ability to carry real weight without sacrificing ride quality. A custom B&W Turnoverball gooseneck hitch means this isn't a truck that poses.

The exterior is clean and functional. Custom-fabricated front and rear bumpers, dual 12,000-pound hidden winches, Baja Designs lighting throughout, and 37-inch Toyo R/T tires on 17x9 Battle Born XRAY forged beadlock wheels give it the presence to match the capability underneath.
The Suspension and Steering
Up front, the truck runs a coil spring radius arm setup built around Kryptonite Ford Death Grip Radius Arms on custom mounts, paired with Fox 2.5 Performance Elite DSC shocks. It's the kind of front suspension that works whether you're running highway miles loaded or picking lines off pavement.
The steering package is equally sorted. Kryptonite's drag link, track bar, tie rod, and ball joints are all spec'd throughout. On a build running 37-inch tires having steering components that can handle the load isn't a nice-to-have, it's the foundation everything else depends on.
Built the Way We Build Everything
This truck reflects the same philosophy behind every Kryptonite component: no shortcuts. You can't put strong parts on one end and leave weak links on the other. The radius arms, coil springs, drag link, track bar, tie rod, and ball joints all work as a system, and when every piece is built to the same standard, the whole truck is better for it.
When it's your own truck on the line, you build it right. That's the standard we hold ourselves to for every customer too.
If you're ready to upgrade your Ford Super Duty's steering and suspension with the same components that went into this build, browse the full Ford Super Duty lineup here.