My history with International Harvester trucks goes back to my childhood. My dad had an old International truck when I was growing up, and those memories stuck with me. Thirty years ago, I finally bought my very first one. Fast forward to today, and I have six or seven mid-50s S-Series trucks sitting in my yard that I actively part out.
The origins of the S-Series nameplate date back to 1955, when IHC introduced it as a successor to the R-Series for the 1956 model year. Whether you are dealing with the light-duty pickups, the heavy-duty S-180 versions boasting those 308 cubic inch “Black Diamond” engines, or the full-size Travelall station wagons, these vehicles are legendary. However, because production of the light-duty S-Series ended in 1957 when it was replaced by the A-series, finding parts today is a massive challenge.
If you are restoring one of these classics, you already know the struggle. Here is my guide on where to buy authentic IHC S-Series truck parts online, based on three decades of getting my hands dirty.
The most important thing you need to know before you start stripping your truck down is this: no one makes reproduction parts for these trucks.
Unlike popular vintage Chevys or Fords where you can open a catalog and order a brand new, factory-spec fender or dashboard bezel, the IHC S-Series community does not have that luxury. You are relying entirely on finding original used parts or tracking down New Old Stock (NOS) that has been sitting on a shelf for sixty years. This makes the hunt both incredibly frustrating and highly rewarding.
Because you can’t just order from a massive aftermarket catalog, you have to get creative and dig deep into the community. Here are my primary methods for sourcing parts.
Facebook groups dedicated to International Harvester enthusiasts are my absolute go-to resource. This is where the real community lives. I use these groups constantly to ask questions, share knowledge, and locate the specific parts I need. Because these trucks are so niche, networking with other owners and hoarders is often the only way to find out who has a junked truck sitting in their back forty.
I also use Car-part.com. It is an online database that links up salvage yards across the country. I will be honest with you: searching for 1950s heavy-duty truck parts on there is kind of a crapshoot. You are essentially just typing in parameters and hoping you get lucky and find something. But when you do finally get a hit on a yard that has an old S-Series sitting in the back, it makes the hours of searching worth it.
Over the last 30 years, I have built up my own private database of specialized International vendors that I can resource from. While I keep my best contacts close to the chest, the lesson here is to keep a running ledger. Whenever you buy a part from a specialized vintage truck yard or an old-timer who hoards IHC parts, save their contact info. Over time, that list becomes your most valuable restoration tool.
Since I currently have six or seven of these trucks that I part out, I supply a lot of parts back to the community myself. When people are hunting for authentic pieces, they can reach out to me directly. I do most of my selling and networking through Facebook and my own website.
When you part out as many trucks as I do, you quickly learn what components rot away first and which ones people are desperate for.
For the mid-50s S-Series and Travelalls, the absolute hardest parts to track down are the headlight rings. These decorative trim pieces were subjected to decades of road debris, weather, and front-end collisions. Because there are no reproductions being made, finding a set of original headlight rings in good, restorable condition is like finding a needle in a haystack. If you see a good set for sale, do not hesitate—buy them.
The unfortunate reality of hunting for rare parts on places like Facebook is that scammers are everywhere. They know you are desperate for that specific piece of trim or mechanical component, and they will try to take advantage of you. Over the years, I have developed strict rules for buying parts online.
When I find a seller online who claims to have the exact part I need, I always make one simple request: send me a current photo of the part with today’s date written on a piece of paper next to it.
This is non-negotiable. Scammers steal photos of truck parts from old forum posts and eBay listings. They cannot produce a custom photo with today’s date on demand. If they refuse or make excuses, I walk away immediately.
When it comes time to actually pay for the part, I only use PayPal. Specifically, you should always use the Goods and Services option. This ensures that if the seller goes ghost, or if the part arrives completely smashed and unusable, you have a layer of financial protection and can get your money back.
Restoring a 1955-1957 International Harvester S-Series is not for the faint of heart. The short production run and lack of aftermarket support mean you are going to spend a lot of time acting like a detective.
My best advice for anyone just starting their restoration journey? Always be on the hunt for parts and trinkets. Make checking the forums, groups, and salvage sites a daily habit, even when you aren’t looking for something specific. Most importantly, just have fun with it. The thrill of finally unearthing that rare part after months of searching is exactly what makes saving these old International trucks so special.
