Chevy 262 (4.3L) V6 HEI Distributor with Super Cap
The TSP Super Cap HEI Distributor for the GM 90° 4.3L V6 is a carbureted HEI ignition upgrade for the Chevrolet 262 CID (4.3L) 90-degree V6 — featuring a Super Cap design that provides a larger diameter distributor cap than the standard HEI version. The increased cap size creates greater physical spacing between the spark plug wire terminals, reducing the risk of crossfire between adjacent cylinder positions and improving plug wire routing in tighter engine bay configurations.
Super Cap vs. Standard Cap — What's the Difference?
The standard HEI cap on JM6521R and the Super Cap on this unit (JM6520R) are both large-cap HEI designs, but the Super Cap offers a wider cap diameter with more terminal spacing. The wider spacing between terminals reduces the risk of high-voltage crossfire — where voltage intended for one cylinder arc-jumps to an adjacent terminal — which can occur in high-performance or high-RPM applications, or when plug wires have developed increased resistance. The Super Cap also provides more physical clearance for routing 90-degree plug wire boots in tight spaces around the cap. If wire routing clearance and crossfire resistance are priorities in your build, the Super Cap is the correct choice. If a more compact cap profile is acceptable, the standard cap JM6521R is functionally equivalent at the same price.
Verify your ignition system before ordering. The 4.3L V6 transitioned from carburetor to Throttle Body Injection (TBI) EFI in approximately 1988 in most applications. This distributor is designed for the carbureted HEI ignition system only and is not compatible with TBI, CMFI, EFI, Vortec, or any computer-controlled ignition system.
Verify your V6 engine family before ordering. The GM 90° V6 (262 CID, small block-based) is not the same as the GM 60° V6 (2.8L, 3.1L, 3.4L). These two families require different distributors. If your engine is a 2.8L, 3.1L, or 3.4L, this distributor is not compatible.
The 65,000-volt internal HEI coil delivers stronger, more consistent spark than a stock or worn factory distributor across the full RPM range. Both mechanical and vacuum advance are included, with a vacuum advance adjustment tool shipped with the distributor.
Standard Cap vs. Super Cap — Which Version Is Right for Your Build?
TSP offers two HEI distributor options for the carbureted GM 90° 4.3L V6 — this Super Cap version (JM6520R) and a standard cap version (JM6521R). Both are HEI designs with an integrated 65,000-volt coil, the same engine fitment, and the same price. The difference is cap size.
The Super Cap features a larger diameter cap with greater spacing between the eight spark plug wire terminals. More spacing between terminals means a lower risk of crossfire — an arcing event where voltage intended for one cylinder jumps to an adjacent terminal rather than firing through the correct plug wire. Crossfire risk increases with higher coil output, worn plug wires, and high-RPM operation. For stock engines and street driving, both cap sizes work equally well. For builds with higher-output coils, performance plug wires, or sustained high-RPM use, the Super Cap's increased terminal spacing is a meaningful advantage. The Super Cap also provides more physical room for routing 90-degree plug wire boots, which can be useful in tighter engine bay configurations.
If neither cap clearance nor crossfire is a concern in your application, the standard cap JM6521R is the simpler choice. If plug wire routing clearance or crossfire resistance matters for your specific build, this Super Cap version is the correct unit.
Carbureted vs. EFI — Verify Before Ordering
The GM 90° 4.3L V6 was produced with a carburetor from approximately 1985 through 1987 in most light truck and van applications before transitioning to Throttle Body Injection (TBI) in approximately 1988. This distributor is for carbureted HEI ignition systems only. If your vehicle uses TBI, CMFI, Vortec, or any fuel injection system, this distributor is not compatible.
Performance Benefit
The 65,000-volt internal HEI coil delivers stronger, more consistent spark than a stock or worn factory distributor across the full RPM range. The magnetic pickup trigger holds timing accurately without the wear and drift that accumulates in points-based systems. Both mechanical and vacuum advance are included, with a vacuum advance adjustment tool allowing the vacuum curve to be tuned for your specific combination.
COMPATIBLE WITH
CHEVROLET 90° V6 (SMALL BLOCK–BASED)
• 3.3L / 200 in³
• 3.8L / 229 in³
• 4.3L / 262 in³
NOTES
• Fits GM 90° V6 engines (200, 229, and carbureted 262ci) based on small block Chevy architecture.
• The 4.3L 262ci was carbureted only in 1985 full-size C/K trucks and G-Series vans; all S-10/S-15 4.3L applications were TBI and are not compatible.
• Not compatible with GM 60° V6 engines (2.8L, 3.1L, 3.4L).
• Not compatible with EFI, TBI, or Vortec distributor systems or computer-controlled ignition.
• This distributor is designed for a 12 volt electrical system with an alternator.
• It is not compatible with a generator and cannot be used with a ballast resistor.
• Distributor gear compatibility should be verified with camshaft material prior to installation.
COMMON VEHICLE APPLICATIONS
Chevrolet Malibu (200ci, 1978–1983; 229ci, 1980–1983)
Chevrolet Monte Carlo (200ci, 1978–1979; 229ci, 1980–1984)
Chevrolet El Camino (200ci, 1978–1983; 229ci, 1980–1983)
Chevrolet Camaro (229ci, 1980–1981)
Chevrolet C/K Full-Size Trucks (229ci, 1980–1984; 262ci carbureted, 1985)
Chevrolet G-Series Van (229ci, 1980–1984; 262ci carbureted, 1985)
GMC C/K Full-Size Trucks (229ci, 1980–1984; 262ci carbureted, 1985)
GMC G-Series Van (229ci, 1980–1984; 262ci carbureted, 1985)
SPECIFICATIONS
Trigger Type: Magnetic
Advance Type: Mechanical And Vacuum
Color: Available in Red, Black
Terminal Gender: Male Super Cap
Mechanical Tach Drive: No
Slip Collar: No
Coil Included: Yes
Coil Type: Internal
Coil Output: 65000 V
Gear Material: Steel
Housing Material: Machined Aluminum
Ignition Box Required: No
Marine Use: No
Cylinders: 6
Vacuum Advance Adjustment Tool: Included
Installation Instructions: Included
Original: $100.50
-65%$100.50
$35.17Product Information
Product Information
Shipping & Returns
Shipping & Returns
Description
The TSP Super Cap HEI Distributor for the GM 90° 4.3L V6 is a carbureted HEI ignition upgrade for the Chevrolet 262 CID (4.3L) 90-degree V6 — featuring a Super Cap design that provides a larger diameter distributor cap than the standard HEI version. The increased cap size creates greater physical spacing between the spark plug wire terminals, reducing the risk of crossfire between adjacent cylinder positions and improving plug wire routing in tighter engine bay configurations.
Super Cap vs. Standard Cap — What's the Difference?
The standard HEI cap on JM6521R and the Super Cap on this unit (JM6520R) are both large-cap HEI designs, but the Super Cap offers a wider cap diameter with more terminal spacing. The wider spacing between terminals reduces the risk of high-voltage crossfire — where voltage intended for one cylinder arc-jumps to an adjacent terminal — which can occur in high-performance or high-RPM applications, or when plug wires have developed increased resistance. The Super Cap also provides more physical clearance for routing 90-degree plug wire boots in tight spaces around the cap. If wire routing clearance and crossfire resistance are priorities in your build, the Super Cap is the correct choice. If a more compact cap profile is acceptable, the standard cap JM6521R is functionally equivalent at the same price.
Verify your ignition system before ordering. The 4.3L V6 transitioned from carburetor to Throttle Body Injection (TBI) EFI in approximately 1988 in most applications. This distributor is designed for the carbureted HEI ignition system only and is not compatible with TBI, CMFI, EFI, Vortec, or any computer-controlled ignition system.
Verify your V6 engine family before ordering. The GM 90° V6 (262 CID, small block-based) is not the same as the GM 60° V6 (2.8L, 3.1L, 3.4L). These two families require different distributors. If your engine is a 2.8L, 3.1L, or 3.4L, this distributor is not compatible.
The 65,000-volt internal HEI coil delivers stronger, more consistent spark than a stock or worn factory distributor across the full RPM range. Both mechanical and vacuum advance are included, with a vacuum advance adjustment tool shipped with the distributor.
Standard Cap vs. Super Cap — Which Version Is Right for Your Build?
TSP offers two HEI distributor options for the carbureted GM 90° 4.3L V6 — this Super Cap version (JM6520R) and a standard cap version (JM6521R). Both are HEI designs with an integrated 65,000-volt coil, the same engine fitment, and the same price. The difference is cap size.
The Super Cap features a larger diameter cap with greater spacing between the eight spark plug wire terminals. More spacing between terminals means a lower risk of crossfire — an arcing event where voltage intended for one cylinder jumps to an adjacent terminal rather than firing through the correct plug wire. Crossfire risk increases with higher coil output, worn plug wires, and high-RPM operation. For stock engines and street driving, both cap sizes work equally well. For builds with higher-output coils, performance plug wires, or sustained high-RPM use, the Super Cap's increased terminal spacing is a meaningful advantage. The Super Cap also provides more physical room for routing 90-degree plug wire boots, which can be useful in tighter engine bay configurations.
If neither cap clearance nor crossfire is a concern in your application, the standard cap JM6521R is the simpler choice. If plug wire routing clearance or crossfire resistance matters for your specific build, this Super Cap version is the correct unit.
Carbureted vs. EFI — Verify Before Ordering
The GM 90° 4.3L V6 was produced with a carburetor from approximately 1985 through 1987 in most light truck and van applications before transitioning to Throttle Body Injection (TBI) in approximately 1988. This distributor is for carbureted HEI ignition systems only. If your vehicle uses TBI, CMFI, Vortec, or any fuel injection system, this distributor is not compatible.
Performance Benefit
The 65,000-volt internal HEI coil delivers stronger, more consistent spark than a stock or worn factory distributor across the full RPM range. The magnetic pickup trigger holds timing accurately without the wear and drift that accumulates in points-based systems. Both mechanical and vacuum advance are included, with a vacuum advance adjustment tool allowing the vacuum curve to be tuned for your specific combination.
COMPATIBLE WITH
CHEVROLET 90° V6 (SMALL BLOCK–BASED)
• 3.3L / 200 in³
• 3.8L / 229 in³
• 4.3L / 262 in³
NOTES
• Fits GM 90° V6 engines (200, 229, and carbureted 262ci) based on small block Chevy architecture.
• The 4.3L 262ci was carbureted only in 1985 full-size C/K trucks and G-Series vans; all S-10/S-15 4.3L applications were TBI and are not compatible.
• Not compatible with GM 60° V6 engines (2.8L, 3.1L, 3.4L).
• Not compatible with EFI, TBI, or Vortec distributor systems or computer-controlled ignition.
• This distributor is designed for a 12 volt electrical system with an alternator.
• It is not compatible with a generator and cannot be used with a ballast resistor.
• Distributor gear compatibility should be verified with camshaft material prior to installation.
COMMON VEHICLE APPLICATIONS
Chevrolet Malibu (200ci, 1978–1983; 229ci, 1980–1983)
Chevrolet Monte Carlo (200ci, 1978–1979; 229ci, 1980–1984)
Chevrolet El Camino (200ci, 1978–1983; 229ci, 1980–1983)
Chevrolet Camaro (229ci, 1980–1981)
Chevrolet C/K Full-Size Trucks (229ci, 1980–1984; 262ci carbureted, 1985)
Chevrolet G-Series Van (229ci, 1980–1984; 262ci carbureted, 1985)
GMC C/K Full-Size Trucks (229ci, 1980–1984; 262ci carbureted, 1985)
GMC G-Series Van (229ci, 1980–1984; 262ci carbureted, 1985)
SPECIFICATIONS
Trigger Type: Magnetic
Advance Type: Mechanical And Vacuum
Color: Available in Red, Black
Terminal Gender: Male Super Cap
Mechanical Tach Drive: No
Slip Collar: No
Coil Included: Yes
Coil Type: Internal
Coil Output: 65000 V
Gear Material: Steel
Housing Material: Machined Aluminum
Ignition Box Required: No
Marine Use: No
Cylinders: 6
Vacuum Advance Adjustment Tool: Included
Installation Instructions: Included
