What body sizes are available on the E-Series?
Four: E-138s and E-138 on the E-350, and E-158s and E-158 on the E-350/E-450 — roughly 73 to 92 sq ft of walkable floor, all with a 7-foot interior height and 36-inch cab-over. See the spec table above.
Platform · Ford E-Series 4x4
Ford E-Series & E-450 4x4 Camper Bodies
The E-Series carries the same interior sizes as our van bodies, but on the Ford E-Series cutaway — a body-on-frame chassis Ford has built for decades, with deep parts and service support and an aftermarket 4x4 conversion available. Ford’s 7.3-litre “Godzilla” gas V8 makes 325 hp and 450 lb-ft, it’s rated up to 14,500 lb GVWR, and it carries a 40-gallon tank. On our Zero-Torsion subframe with 22° of articulation, the frame flexes over the terrain while the subframe absorbs the twist, so the composite body stays square with far less of that load passed into it.
At a glance
The Ford E-Series 4x4 platform in brief
- Chassis
- Ford E-Series E-350 / E-450 Cutaway
- Bodies
- E-138s · E-138 · E-158s · E-158
- Engine
- Ford 7.3L “Godzilla” gas V8 — 325 hp / 450 lb-ft
- Max GVWR
- Up to 14,500 lb
- Fuel
- 40-gallon tank
- Subframe
- Zero-Torsion, 22° of articulation
- 4x4
- Aftermarket 4x4 conversion available
Specifications
Ford E-Series 4x4 body sizes
| Model | Chassis | Wheelbase | Overall length | Walkable floor | Max GVWR | Fuel |
|---|---|---|---|---|---|---|
| E-138s | Ford E-Series 350 Cutaway | 138" | 19' | 73 sq ft | 11,500 lb | 40 gal |
| E-138 | Ford E-Series 350 Cutaway | 138" | 20'3" | 82 sq ft | 11,500 lb | 40 gal |
| E-158s | Ford E-Series 350/450 Cutaway | 158" | 20'3" | 82 sq ft | 14,500 lb | 40 gal |
| E-158 | Ford E-Series 350/450 Cutaway | 158" | 21'9" | 92 sq ft | 14,500 lb | 40 gal |
Download the full 2026 spec pack (every body size, dimension, option, and warranty) from the Platforms page.
Can a Ford E-450 be converted to 4x4?
Yes. The E-Series is a body-on-frame chassis, which makes it well suited to a proper 4x4 conversion — a suspension lift, transfer case, and large all-terrain tires — done by a specialist 4x4 conversion partner. That is what turns the E-450 into a genuine backcountry expedition van, with low-range capability and ground clearance a unibody van can’t match. Foundation coordinates the chassis and builds and installs the composite body; the 4x4 conversion is performed by the conversion provider.
Why an E-450 instead of a Transit or Sprinter
The E-Series is the choice when you want to go further off pavement and carry more. The body-on-frame design takes a real 4x4 conversion; the Godzilla gas V8 puts down strong low-end torque for grades and heavy builds, with fuel and service available almost anywhere; and up to 14,500 lb GVWR plus a 40-gallon tank give the payload and range for heavier, longer, farther trips. It works just as well for a mobile-work fleet as for a four-season expedition camper.
E-350 versus E-450: what changes
Both take the same Foundation body. The E-450 steps up the chassis rating for more payload — our E-158s and E-158 bodies are offered up to 14,500 lb GVWR — while the E-350 (E-138s / E-138) is the lighter, more maneuverable base. Choose by how much you’ll carry and how long a body you need; the spec table above lays out each.
How the body is mounted, and what the subframe does
A body-on-frame chassis twists over rough ground. Bolt a rigid box straight to it and that twist cracks walls and springs doors. Our Zero-Torsion subframe sits between the chassis and the body and pivots, allowing up to 22° of articulation — the frame flexes over the terrain while the subframe absorbs the twist, so the composite habitat stays square with far less load passed into it. It is built to outlast the truck, with corrosion-protected structure underneath.
What Foundation provides versus the 4x4 provider
Foundation manufactures the composite body, builds the Zero-Torsion subframe, and installs the body on the chassis as a final-stage manufacturer — road-legal and titled. The 4x4 conversion (lift, transfer case, axles, tires) is done by the specialist conversion provider. From there the interior is finished by you or your professional builder.
Common questions
Ford E-Series 4x4 — questions people ask
What engine does the E-Series use?
Ford’s 7.3-litre “Godzilla” gas V8, making 325 hp and 450 lb-ft — strong low-end torque for grades and heavy builds, with gas fuel and service available almost anywhere.
Can another interior builder finish the vehicle?
Yes. The body leaves our shop road-legal and titled, so you can outfit it yourself or hand it to any professional builder for the interior.
What does the 22° articulation figure mean?
It is how much the Zero-Torsion subframe lets the chassis twist relative to the body off-road. That controlled flex is what keeps the rigid composite habitat from taking the stress of the frame twisting, so walls and seals last.
Related