1947-55 Chevy GMC 3100 Truck Chassis Parts
What happens underneath a 1947-55 Chevy or GMC 3100 depends heavily on what the finished truck is meant to become. One project may retain leaf springs and simply need fresh mounting hardware, while another may introduce a different rear axle, V8 or LS power, a 4-link, or Mustang II independent front suspension. This collection brings the chassis parts for those very different build paths into one vehicle-specific category.
Start With the Parts of the Original Chassis You Plan to Keep
This collection is less about a single upgrade and more about how far the truck moves from its original chassis. At one end are leaf-spring hardware, shackles, shock mounts, sway bars, and cab bushings that keep much of the factory architecture intact. At the other are Mustang II IFS and 4-link systems that fundamentally change how the truck is supported and located.
The drivetrain sits between those two extremes. Traditional Chevy V8 builds can use engine-and-transmission crossmembers, rubber or polyurethane mounts, and dedicated hardware, while LS and LT adapters offer a different route for modern engine swaps.
Once Mustang II IFS enters the build, those decisions begin to overlap. The new front suspension changes the structure available for engine mounting, which is why separate V8 brackets and engine-and-transmission crossmember packages exist specifically for IFS-equipped trucks.
Rear suspension work creates a similar progression. Lowering blocks can work within a leaf-spring setup, while 4-link hardware, shock crossmembers, and C-notches move toward a much more extensively modified rear chassis. The collection therefore follows the truck from preservation and selective changes to a front-to-rear chassis transformation.
FAQ
What chassis parts are available for 1947-55 Chevy and GMC 3100 trucks?
POL currently lists 45 products in this collection. They include engine and transmission mounting components, rear-end conversion hardware, shock mounts, lowering blocks, C-notches, cab mounts, sway bars, 4-link suspension, Mustang II IFS systems, and related chassis parts.
Does POL carry engine mounts for 1947-55 Chevy trucks?
Yes. Options include a 1947-59 V8 engine mount crossmember, combined engine-and-transmission mounting packages, Chevy V8 mounts, LS adapters, LT adapters, and weld-in V8 brackets for trucks using Mustang II IFS.
Can I install Mustang II suspension on a 1947-55 Chevy or GMC truck?
Yes. The collection currently contains several Mustang II IFS systems for 1947-55 Chevy/GMC trucks, including manual- and power-steering configurations and different wheel bolt patterns. A Heidts system is also available.
Are parts available for converting the rear suspension?
Yes. POL currently lists a complete 1947-53 4-link suspension kit, a rear-end conversion kit with shock mounts, lowering hardware, and C-notch products. Match the parts to the axle and rear suspension configuration being used.
Does POL offer a C-notch for 1947-55 Chevy trucks?
Yes. A weld-in rear frame C-notch specifically for 1947-55 Chevy and GMC trucks is included in the collection. A universal weld-in rear C-notch is also currently listed.
Can I keep the original leaf-spring suspension and still use parts from this collection?
Yes. The collection includes front and rear leaf-spring pin and shackle kits, lowering blocks, shock mounts, sway bars, and other components that do not require converting the truck to a 4-link or Mustang II suspension.
How should I choose chassis parts for a 1947-55 Chevy or GMC truck?
Start by deciding which original systems will remain. Identify the front and rear suspension design, rear axle, engine, transmission, intended ride height, and any planned Mustang II or 4-link conversion. Then use the exact product fitment to build a compatible combination.