8 inch GM Suspension Lift Kit - 1973-1991 GM 1-2 Ton Solid Axle Vehicles 4WD-K423
SuperLift 8 inches Suspension Lift Kit for 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 Chevy:GMC 1:2 Ton Solid Axle Vehicles 4WD 2SuperLift 8 inches Suspension Lift Kit for 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 Chevy:GMC 1:2 Ton Solid Axle Vehicles 4WD 1SuperLift 8 inches Suspension Lift Kit for 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 Chevy:GMC 1:2 Ton Solid Axle Vehicles 4WD

SuperLift 8″ Suspension Lift Kit for 1973-1991 Chevy/GMC

$839.95

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SKU: K423 Category: Brands: .

Product Description

SuperLift 8″ Suspension Lift Kit for 1973, 1974, 1975, 1976, 1977, 1978, 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991 Chevy/GMC 1/2 Ton Solid Axle Vehicles 4WD

Part: K423

  • Heavy Duty Front leaf springs
  • Durable Urethane spring eye bushings
  • Degree shim installed on the front springs to help driveline angle
  • Rear lift options include add-a-leaf and block or full replacement rear spring
  • Raised steering arm and drop drag link included
  • Sway bar drop brackets included
  • Front driveshaft spacer available
  • Superlift Superide shock absorbers included
  • Lifetime Warranty
  • Satisfaction Guarantee

Tire and Wheel Info

38×14.50 tire on standard offset wheel

IMPORTANT DISCLAIMER: The provided tire/wheel fitments are approximate.

Actual dimensions of a given tire size can vary considerably from one brand to another.

Manufacturers’ wheel offset and backspacing measurement points are not always consistent.

Backspacing greatly impacts tire-to-fender clearance when turning.

Wheel width and backspacing influence whether the tires protrude past the fenders, and to what extent.

Considering these important factors, we recommend that you fit-check your tire/wheel selection prior to purchasing.


Installation Notes

1977.5-91 models require clearancing (machining) of the front driveshaft CV cluster to prevent binding. If vehicle has single exhaust, the cross-over pipe requires modification to clear front driveshaft.

Optional extended length brake hoses recommended.

Brake line / hose relocating hardware included in kit box.

Both driveshafts need to be lengthened.

This is a SwampRunner Series lift system that is intended primarily for off-road or exhibition use. Reference the “Important Product Use” section of the Warranty for additional safety related information.

Vehicles with 56″ long rear spring can use spring if shackle hanger is relocated on frame for 52″ long application.

88-91 Blazer, Jimmy, and Suburban require additional sleeve kit part # 315-88.


Installation Instructions


Product Overview

The 8″ lift consists of Heavy Duty (HD) front leaf springs, durable Poly spring bushings, replacement front U-bolts, front sway bar brackets, brake hose relocation brackets, add-a-leafs and a rear block and u-bolt kit. For steering correction, a 4″ raised steering arm and a 4″ adjustable drag link are also included. The kit is packaged complete with Superlift Superide shock absorbers.

Options include single and dual steering stabilizers, a 4″ rear shackle flip kit and a front driveshaft spacer.

NOTE: If the vehicle is factory-equipped with auxiliary (dual) front shocks also order quantity two, part number 85150 Superide shocks.

NOTE: 88-91 Blazer/Jimmy and Suburban models require additional part number 315-88 bushing sleeve kit.


Fitment Table

Year RangeMakeModelDrivetrainEngineCab
1973-1987Chevy/GMC1/2-ton Pickup4WD
1973-1991Chevy/GMC1/2-ton Suburban4WD
1973-1991Chevy/GMCBlazer / Jimmy (Fullsize)4WD

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