Homegrown 4X4 Van Conversions with The Swim Shop

In this episode, host Beau Wigington visits Justin and Seth Williams of SwimShop 4x4 to unpack how they convert GM G-Series vans into capable four-wheel-drive rigs, and the MIG welding habits that keep those projects rolling. Key Topics Covered Why van conversions? The rock-n-roll roots, “rolling living room” ethos, and first builds that sparked a business. Unibody reality check: why G-Series vans aren’t body-on-frame, and what that changes in your fab plan. The jig story: cutting a donor van’s underbody, flipping it, and welding it to a table to build 126+ kits consistently. Bolt-on vs weld-on: using existing van holes, minimizing welds to two key pieces, and where welding is still essential. MIG setup in the shop: clean metal, penetration, heat/wire adjustments, and why “don’t zoom in” can still be structurally sound. Parts sourcing workflow: diffs, transfer cases, running gear—how junkyards and Marketplace make the puzzle come together. Square-body compatibility: designing around ¾-ton Suburban geometry so catalog parts actually fit. Working with family: keeping shared interests, sharing space, and growing a shop together. Memorable Quotes “We thought they had frames… then we realized it’s a unibody. Whole different animal.” “We cut the van’s underbody out, flipped it, welded it to a table—that’s our jig.” “Everything’s bolt-in using factory holes—only two pieces need welding.” “With MIG: clean metal, good penetration. When it clicked, it clicked.” “Anything that bolts onto a square-body truck fits our kit.” Save 20% On Related American Welding Program Courses With WELD20 Use code WELD20 at checkout for eligible courses - https://foxly.link/9T3dtc Connect with The Swim Shop 4x4 Instagram - @theswimshop4x4   / theswimshop4x4   YouTube -    / @jswgarage   Website - https://www.theswimshop4x4.com/ Connect with Beau Wigington Instagram: @beaudiditwelding —   / beaudiditwelding   LinkedIn:   / beauwigington   E-mail: [email protected]