International Harvester pickups
Explore International's broader full-size truck history; this overview is still undergoing editorial expansion.
Explore the overview1973 International Light Line · Model 1010 · Editorially reviewed October 8, 2026
The 1973 International Harvester 1010 Bonus Load is appealing because it pairs a restrained, square-shouldered pickup design with unusual choices in chassis engineering. But its most important identifying words have often been mixed up: 1010 describes a half-ton model with independent torsion-bar front suspension; Bonus Load describes a pickup-box style, not a separate heavy-duty suspension package. [1–5]
The original version of this story treated “Bonus Load” as a special suspension, described every truck as heavily equipped, and called the 1973 model International's final full-size pickup. Those claims overreach the surviving documentation. The following is a model-history and collector-identification guide, not an inspection of a particular vehicle.
What the names mean: 1010 and Bonus Load
1010 belongs to International's 1971–1973 Light Line number-series models. The Bonus Load designation refers to the straight-sided pickup box offered alongside stepside bodies. The box designation does not establish the engine, suspension upgrades, tow rating, weight rating, or cab equipment on any one truck. Hagerty's Light Line history explicitly describes stepside and Bonus Load pickup boxes as body choices. [1–3]
| Label or feature | What the research supports |
|---|---|
| 1010 | Half-ton Light Line series used through 1973; independent front suspension using torsion bars |
| 1110 | Related half-ton series with solid I-beam front axle; do not assume the same front-end parts as a 1010 |
| Bonus Load | Pickup-box style; not evidence of a “Bonus Load suspension” or factory high-output package |
| 1974–1975 Light Line | Later pickup model designations and chassis revisions; not a continuation of the 1010 badge |
Why the 1010 front suspension matters
The meaningful mechanical distinction is between the 1010's independent torsion-bar front suspension and the 1110's solid I-beam front axle. International's archived model-number history explains that the corresponding half-ton models were differentiated by front-suspension design rather than simply being two strength levels. A period International corporate photograph in the Wisconsin Historical Society archive independently identifies an 1110 with an I-beam front axle. A specialist parts supplier separately catalogs torsion-bar bushings for the 1010 and warns against using the same parts on the 1100/1110. [2, 4, 5]
That does not mean a 1010 was automatically suited to heavier towing, or that it used an unusually strong fully boxed frame. The legacy article provided no 1973 order code, chassis drawing or vehicle-specific rating that would establish either assertion. Use the vehicle's actual data plate, period ratings and component inspection instead of deriving capability from a nickname.
The bodywork: functional design rather than invented features
International's Light Line styling from 1969 emphasized relatively plain body sides and a broad, upright cab. The 1971 series received a revised front treatment, and the grille changed again for 1972; those details can inform model-year research but are not definitive when parts have been swapped. Period images and factory specification sheets are better evidence than a single photograph of a restored vehicle. [1, 3]
The Bonus Load box suits the truck's functional, straight-sided appearance. However, its shape should not be confused with a special cab length, an extended-cab edition or a technology package. Step-sided and Bonus Load-bodied trucks existed alongside one another in the Light Line range, while variations in box length, wheelbase, cab and trim need to be checked against exact-model materials. [1, 3]
What engines and transmissions could a buyer encounter?
International's 1969–1975 Light Line family used AMC-sourced inline-six engines and IH's own 304-, 345- and 392-cubic-inch V8 family across model years and configurations. Hagerty describes manual and automatic transmission alternatives across the truck family. Those broad line-wide lists must not be read as proof that each engine and gearbox combination was offered on a specific 1973 1010. The vehicle's individual line-setting record, actual engine identifiers and year-specific factory specification sheet have priority. [1, 3]
Especially on a half-century-old pickup, an IH V8 badge or a modern engine appearance is not adequate proof of original equipment. A rebuild, engine substitution, changed axle ratio or replacement transmission may materially affect operation, documentation and parts sourcing.
Was 1973 the final International full-size pickup year?
No. The 1010 number-series label was used through 1973; International reorganized pickup designations for 1974, including the 100-series half-ton line. The Light Line pickup family itself continued through 1975. The old statement calling a 1973 1010 the last International full-size pickup therefore confuses the end of a model name with the end of the product line. [1–3, 6]
International's Scout models continued after the full-size Light Line pickups ended. This distinction also matters when interpreting later International badges and chassis names, which do not establish that a particular 1973 1010 was a late-production or final-year example.
Identification checks before buying or restoring a 1010
- Confirm vehicle identity. Compare the chassis/data-plate identifiers, title and any surviving factory line-setting ticket; do not authenticate the truck from a grille or bed alone.
- Establish the correct model family. Check 1010 versus 1110, year, wheelbase, drive configuration and applicable weight ratings before ordering chassis parts.
- Identify the box. Document straight-sided Bonus Load versus stepside bodywork, box length and repairs or substitutions.
- Examine the torsion-bar system. Check control-arm mounts, bushings, torsion-bar anchors, corrosion, alignment and evidence of non-original components with a qualified mechanic.
- Verify drivetrain and brakes. Confirm engine casting or identification numbers, transmission, axle, steering and brake condition against the actual vehicle, not a generic advertised option list.
- Evaluate structure and records. Inspect frame repairs, underbody corrosion, body mounts, prior welding, service history and whether changes are disclosed in writing.
- Separate rating from condition. Period GVWR or payload figures and present mechanical safety are different questions; neither can be inferred from “Bonus Load.”
International's original pickup specification-sheet collection, preserved by the Wisconsin Historical Society, includes pages expressly titled “1010, 1110, 1210, 1310 Pickup.” It is a strong starting point for model research. The archive's listing does not, by itself, authenticate any surviving vehicle. [1]
Why this distinction matters
The 1973 International 1010 is interesting without inventing a “Bonus Load suspension” or suggesting it was the last full-size International pickup. Its honest design, half-ton torsion-bar-front-end identity and choice of body configurations are specific enough to tell a useful collector story. A trustworthy appraisal of a particular truck must go farther: the data plate, original specifications, drivetrain numbers, mechanical inspection and ownership documentation all matter.
For a wider view of International pickups, visit our International Harvester historical overview (an overview still undergoing expansion). To prepare a vehicle-specific inspection, use the Classic Car Inspection Planner.
Research sources and editorial boundaries
Period archive records and knowledgeable marque-history sources support model names and equipment families; they are not vehicle-specific proof. The earlier article's unsupported “Bonus Load suspension,” “fully boxed front section” and “final 1973 pickup” assertions are not retained.
- Wisconsin Historical Society — International Truck Specifications, Number Series Pickups, 1963–1973: inventory of original International Harvester factory sheets, including 1010–1310 pickup series.
- OldIHC — IHC Light Line Model Numbers: marque-specialist account of the 1010/1110 distinction and the 1971–1975 naming chronology.
- Hagerty — 1973 International 1010; 1969–1975 Light Line historical description: Bonus Load and stepside boxes, Light Line engine and transmission families, and final 1975 production year. Valuation estimates are not used.
- Wisconsin Historical Society — 1971 International 1110 pickup (IH archival image catalog): manufacturer-submitted description identifies a half-ton 1110 with an I-beam front axle.
- International Pickup & Travelall Parts — 1010 torsion-bar service bushings: parts-catalog corroboration; parts applicability must be checked individually.
- Old Cars Weekly — Car of the Week: 1975 International D-200 Pickup: later Light Line 200-series context confirming production continued beyond 1973.
