Ford P-400 Parts & Accessories

Ford P-400 Parts & Accessories

The Ford P-400 was a heavy-duty step van in the P-series forward-control commercial lineup, positioned above the P-350 to accommodate larger walk-in body configurations required by laundry, dry cleaning route operators, and larger package delivery services that needed higher payload capacity than medium-duty P-350 chassis could provide. It used the 360 and 390 cubic-inch FE V8 engines and the 300 cubic-inch inline-six in commercial tune, paired with heavier commercial axles and braking systems appropriate for the P-400's elevated GVWR. These vans carried Ford's commercial reputation for durability through decades of commercial service, and surviving examples are now being repurposed for food trucks, mobile showrooms, and specialty commercial conversions. This collection provides the parts and components that support P-400 maintenance, restoration, and conversion projects.

Popular Upgrades

P-400 owners most commonly address front kingpin rebuild kits for the commercial steer axle, along with brake hardware including master cylinders, wheel cylinders, and drum hardware that are critical safety items on a step van of this GVWR class. FE V8-equipped P-400s benefit from Holley 600 cfm replacement carburetors and Pertronix electronic ignition conversions that improve reliability and reduce maintenance intervals on high-cycle commercial engines. Rear leaf spring pack replacements with commercial-duty units restore the correct ride height and load rating on P-400s that show sag from years of loaded delivery service.

Performance and Handling

The P-400 uses a solid front steer axle with kingpin geometry and a leaf-spring solid rear axle in a commercial chassis configuration designed to carry walk-in body payloads within its GVWR rating reliably. Kingpin and thrust bearing replacement is the most important steering maintenance item on any P-400 that shows steering looseness or wander, and this work requires pressing equipment and a proper rebuild kit specific to the Dana or Ford commercial steer axle used. Rear spring upgrades with commercial-grade leaf packs that match the P-400's load rating restore both ride height and suspension compliance that degrade on high-mileage vans.

What engines were available in the Ford P-400 step van?

The P-400 was available with the 300 cubic-inch inline-six as the base engine for lower-payload applications, with the 360 FE and 390 FE V8 engines available for higher-payload and heavier commercial body configurations. The FE engines in commercial step van tune used different carburetors and intake manifolds than the high-performance street versions, optimized for low-speed torque and durability rather than peak horsepower. All three engines accept standard Ford commercial truck maintenance parts and the Holley and Edelbrock upgrade catalog appropriate to their displacement family.

How do I convert a Ford P-400 to a food truck?

The P-400's larger interior capacity compared to P-350 and P-100 vans makes it an excellent foundation for a commercial-scale food truck or mobile commissary, with enough floor space to accommodate a full commercial kitchen line including fryers, a grill, and commercial refrigeration. The conversion process involves reinforcing the floor for commercial equipment mounting, installing a commercial-grade exhaust and ventilation hood, adding propane or natural gas plumbing, and fitting a commercial electrical service panel for kitchen equipment loads. Florida health codes require a commercial vehicle inspection and kitchen approval before operation, and the P-400's sturdy body structure easily accommodates the modifications needed to pass inspection.

Why These Parts Fit Right

Parts in this collection are selected specifically for the P-400's heavier commercial chassis and GVWR rating, ensuring that brake, suspension, and drivetrain components are rated for commercial duty rather than standard P-350 or lighter-duty step van applications. FE V8 and inline-six fitments are noted separately where engine-specific hardware differs. Fast shipping keeps your P-400 in service or your conversion on schedule.

Browse our exhaust systems for FE 360 and 390 V8 manifold and exhaust options, explore suspension components for commercial kingpin and leaf spring hardware, and check our air intake systems for FE and inline-six intake and carburetor upgrades.