Squarebody Cummins ZF6

Thanks to cumminsconversion.com for making such a plug-and-play ZF6 transmission adapter kit for Cummins swaps. My truck had a Getrag 360, which I hated shifting. Now I can shift it so much easier! If you have any questions, feel free to drop a comment — I'll be happy to help you out. Keep in mind I'm not a professional video editor, so enjoy! Kit link: https://cumminsconversion.com/product... 1973 Chevy Squarebody + 12V Cummins + ZF6 | SEMA Overland Build I turned a 1973 Chevy Crew Cab Utility Long Bed into a mechanical diesel overland truck powered by a 12V Cummins Turbo Diesel and a 1999 Ford ZF6 6-speed manual transmission. The truck originally ran a Getrag 360, but after putting it through real-world use, it was time for a stronger transmission. The Getrag 360 had to go — and the ZF6 6-speed went in. After taking the truck to SEMA 2025 and getting it off-road, I found the next thing that needed attention: rear traction. The truck runs a GM 11.5 AAM rear axle from a Duramax 2500HD, and the next upgrade is an Eaton Truetrac to help put all that Cummins torque to the ground. 🔧 BUILD SPECS • 1973 Chevy Crew Cab Utility Long Bed • Mechanical 12V Cummins Turbo Diesel • Ratman Performance VE Pump • 1999 Ford ZF6 6-Speed Manual • GM Dana 60 Kingpin Front Axle • GM 11.5 AAM Duramax Rear Axle • Modern GM 2500HD Brake System • 37x13.50R20 MT Tires • Four Odyssey Batteries • EMP Shield • Rhino Linings Utility Bed • Rough Country Rooftop Tent • Rough Country 240° Awning • Refrigerator / Auxiliary Camping Power 🏕️ BUILT TO BE USED This isn't just a show truck. The goal is a rugged, mechanically simple overland and utility truck that can be driven, camped in and taken off-road. 12V Cummins + ZF6 + Dana 60 + 11.5 AAM + 37s Old-school truck. Heavy-duty drivetrain. Modern capability. 🏆 SEMA 2025 The truck was displayed at SEMA 2025, where the unusual combination of a 1973 Chevy, 12V Cummins, ZF6, Dana 60 and Duramax 11.5 AAM got plenty of attention. Now the build continues with more drivetrain upgrades and off-road testing. 🤝 BUILD PARTNERS Huge thanks to the companies helping make this build possible: Rhino Linings • Interco Tires • LMC Truck • Painless Performance • EMP Shield • Vannatta Fabrication • Black Widow Exhaust • Forever Sharp • Razor Customs Machining • Odyssey Battery • Iron Bull Bumpers • Yukon Gear • Track Spec Motorsports • Drivelines Inc. • BuiltRight Industries • Rough Country • Eaton 👨‍🔧 ABOUT LSX REVIVAL I've spent 20+ years working hands-on with automotive and diesel vehicles, including performance builds, diesel conversions, technical writing and professional technician training. My work has appeared in MotorTrend, Diesel Power, Diesel Tech Magazine and 8-Lug HD Truck Magazine. I've also appeared on Spike TV's Car Warriors, and one of my builds — a twin-turbo 1,000 HP 1969 Camaro — was featured on Straight Up Steve Austin with Stone Cold Steve Austin. 📲 FOLLOW THE BUILD Instagram: @LSXRevival YouTube: @LSXREVIVAL Linktree: thestig More Cummins swaps, fabrication, drivetrain upgrades, off-road testing and real-world truck abuse coming. If you're into Squarebody Chevys, 12V Cummins, ZF6 transmissions, Dana 60s, Duramax axles, Eaton Truetrac, diesel trucks, overlanding and SEMA builds, subscribe and follow along. #Squarebody #12VCummins #Cummins #ZF6 #SquarebodyChevy #CumminsSwap #DieselTruck #Overland #SEMA2025 #Dana60 #AAM115 #EatonTruetrac #LSXRevival