14 Ignition parts are listed for the 1966 Fargo W200 Pickup, in 3 part types, covering the 3.7L 225cid L6 engine. Each one has a brand, a manufacturer part number and notes that say where it fits.
On the 1966 Fargo W200 Pickup, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules. All 14 listed parts are Ignition Coil (7 parts), Spark Plug (5 parts) and Spark Plug Tube Seal (2 parts).
Every part on this page is matched to the 3.7L 225cid L6 — the only engine offered in the 1966 Fargo W200 Pickup.
The most listed brands for 1966 Fargo W200 Pickup ignition parts are STANDARD MOTOR PRODUCTS (2 parts), ACDELCO (2 parts) and CHAMPION (2 parts), plus 7 more brands. Quality grades include Economy, Copper / Nickel and Standard Replacement.
3 parts on this 1966 Fargo W200 Pickup page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including ACDELCO U505 (Ignition Coil) and ACDELCO R44XLS (Spark Plug). Click any part number to see every vehicle that part fits.
Ignition Coil
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FVP | UC12F | 🇨🇦 CA | View on Amazon | |
| HOLSTEIN | 2IGC0056 | 🇨🇦 CA | View on Amazon | |
| SKP | SKUC12 | 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS | UC12T | 🇨🇦 CA | T-Series | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | U505 | 🇺🇸 US 🇨🇦 CA | Professional | View on Amazon |
| WELLS Popular | 5C1026 | 🇨🇦 CA | Requires External Resistor: YES | View on Amazon |
| STANDARD MOTOR PRODUCTS | UC12 | 🇨🇦 CA | View on Amazon |
This table covers the coils that fire each spark plug. Typical signs include a misfire that follows one cylinder, a snap in damp weather, or a coil that is swollen or cracked. Swap a suspect coil with a neighbor to confirm, then replace boots that tore on the way off.
7 Ignition Coil parts are listed for the 1966 Fargo W200 Pickup, from STANDARD MOTOR PRODUCTS, FVP, HOLSTEIN and 3 other brands. ACDELCO U505 carries the "Popular" badge.
In the Economy grade, FVP, HOLSTEIN, SKP and 1 other brand supply 4 parts: the catalog's value-priced group. A representative part number is FVP UC12F.
The Standard Replacement section lists 3 options from ACDELCO, WELLS and STANDARD MOTOR PRODUCTS — built to original-equipment specification. ACDELCO U505 is listed in this group.
Listed part numbers: ACDELCO U505, FVP UC12F and HOLSTEIN 2IGC0056, plus the other parts above.
Spark Plug
Summary: Notes include pre-set gaps of 0.025", 0.026", 0.035" and 0.039". Replacement brands in this table include CHAMPION, AUTOLITE and ACDELCO.
Copper / Nickel
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Popular | R44XLS | 🇺🇸 US 🇨🇦 CA | ProfessionalConventional | View on Amazon |
| CHAMPION | 120 | 🇨🇦 CA | Copper PlusPre-Set Gap: 0.026" | View on Amazon |
| CHAMPION | 123 | 🇨🇦 CA | Copper PlusPre-Set Gap: 0.025" | View on Amazon |
Double Platinum (lasts up to 3x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE | APP65 | 🇨🇦 CA | Double PlatinumPre-Set Gap: 0.035" | View on Amazon |
Platinum (lasts up to 2x longer than Copper / Nickel)
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOLITE | AP65 | 🇨🇦 CA | Platinum Spark PlugDisplay Pack | View on Amazon |
This table covers the spark plugs for this engine. Typical signs include misfire under load, rough idle, or a flashing check-engine light. Verify the gap even on pre-gapped plugs, and replace coil boots that come off a high-mileage engine.
5 Spark Plug parts for the 1966 Fargo W200 Pickup come from 3 brands — CHAMPION, AUTOLITE and ACDELCO. The "Popular" part is ACDELCO R44XLS.
The Copper / Nickel section lists 3 options from CHAMPION and ACDELCO — grouped under the catalog's "Copper / Nickel" designation — the notes column spells out what sets them apart. ACDELCO R44XLS is listed in this group.
The Double Platinum (lasts up to 3x longer than Copper / Nickel) section lists 1 option from AUTOLITE — grouped under the catalog's "Double Platinum (lasts up to 3x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. AUTOLITE APP65 is listed in this group.
The Platinum (lasts up to 2x longer than Copper / Nickel) section lists 1 option from AUTOLITE — grouped under the catalog's "Platinum (lasts up to 2x longer than Copper / Nickel)" designation — the notes column spells out what sets them apart. AUTOLITE AP65 is listed in this group.
Listed part numbers: ACDELCO R44XLS, CHAMPION 120 and CHAMPION 123, plus the other parts above.
Spark Plug Tube Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MAHLE / CLEVITE | GS33731 | 🇨🇦 CA | Spark Plug Tube Seal KitMolded Rubber | View on Amazon |
| VICTOR REINZ | 181000301 | 🇨🇦 CA | Valve Cover | View on Amazon |
This table covers the seals at the Spark Plug Tube. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.
2 Spark Plug Tube Seal parts are listed for the 1966 Fargo W200 Pickup, from MAHLE / CLEVITE and VICTOR REINZ.
This group includes MAHLE / CLEVITE GS33731 and VICTOR REINZ 181000301.
Buying Ignition Parts for a 1966 Fargo W200 Pickup
On this vehicle, the ignition system delivers spark at the right moment — plugs, coils, wires, distributors and ignition modules.
- Confirm you have the 3.7L 225cid L6 engine — every part on this page is matched to it.
- Read the notes on each row for position, trim and spec qualifiers before you order.
- Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
- Cross-reference the manufacturer part number against your old part or a service-manual listing.
Start with the largest groups on this page: Ignition Coil and Spark Plug .
Frequently Asked Questions
How many ignition parts fit the 1966 Fargo W200 Pickup?
Our catalog currently lists 14 ignition parts for the 1966 Fargo W200 Pickup across 3 subcategories and 10 brands, covering the 3.7L 225cid L6 engine. Each part is matched to the engine(s) it fits.
What are the signs of ignition problems on a 1966 Fargo W200 Pickup?
Common symptoms include misfires under load, rough idle, flashing check-engine light, or poor starting in damp weather. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.
What spark-plug gap is listed for the 1966 Fargo W200 Pickup?
Notes on this page include pre-set gaps of 0.025", 0.026", 0.035" and 0.039". Still verify against spec — even “pre-gapped” plugs should be checked before they go in.
What should I replace at the same time?
Where labor overlaps, replace plugs and wires (or coil boots) as a set — one weak cylinder makes the whole set feel bad.
What do the market flags (US, CA, MX) on each part mean?
They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 1966 Fargo W200 Pickup was originally sold in the US, the safest choice is a part marked for the US market.
How do I make sure a part fits my 1966 Fargo W200 Pickup?
Every part on this page is matched to the 3.7L 225cid L6 engine. Then gap matters even on “pre-gapped” plugs — verify against spec, and replace coil boots when they come off a high-mileage engine. The notes column carries position and trim qualifiers where they apply.
Other Parts for the 1966 Fargo W200 Pickup
Ignition Parts for Other Fargo W200 Pickup Years
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