1973-1987 Squarebody Chevy | LTAC Garage

LTAC Garage / Chevrolet / 2WD

Your squarebody. Your next chapter.

Build a better-driving 1973–1986 C10 or 1987 R10. Choose parts for your truck’s year and existing hardware, or bring LTAC into the plan for your whole build.

Burgundy Chevrolet squarebody pickup in a workshop — illustrative vehicle image

Start with your truck’s configuration

This Garage covers half-ton C10/R10 2WD pickups. Check the engine, transmission, wheelbase, steering connections and any spindle changes before ordering. K10 4WD applications require a separate selection.

Brakes & stance

Six-piston stopping power. A matched spindle plan.

This front-brake combination is for 1973–1987 C10/R10 2WD trucks using the required Wilwood steel drop spindles. The kit and spindles are sold separately.

Wilwood 140-15940-DR front six-piston brake kit

Wilwood 140-15940-DR front brake kit

Red six-piston Superlite calipers and 12.19-inch drilled and slotted rotors. Hubs support 5 x 4.75-inch and 5 x 5-inch bolt patterns.

Requires 831-15932 one-piece steel ProSpindles. This is not a stock-spindle kit or a rear-brake kit. Flex hoses and spindles are separate.

Shop the front brake kit
Wilwood 831-15932 steel drop spindle pair

Required: Wilwood 831-15932 ProSpindles

A left and right cast-steel spindle pair with integrated steering arms and a 2½-inch drop. Match these to the Wilwood brake kit above.

For matching Wilwood brake kits only. Do not pair with stock brakes or substitute the aluminum Modular Pro spindle.

Shop the matching spindles

Before ordering, check your wheel against Wilwood’s kit clearance template; wheel diameter alone does not establish fit. Match hose fittings, routing, master cylinder and rear-brake balance to the installation. This selection does not cover K10 4WD or C20/C30 trucks.

Steering

A more precise feel behind the wheel

Borgeson 800132 power steering box

Borgeson 800132 quick-ratio power steering box

A 12.7:1 steering box for the original C-series/R-series power-steering layout, with a 3/4-inch 30-spline input. Fits the original power-steering pitman arm and includes inserts for flare-style hose connections.

1973–76 trucks require the 990012 rag-joint connector. A manual-to-power conversion also needs the appropriate power-steering pitman arm, pump, hoses and supporting parts; this box is not a complete conversion kit.

Shop Borgeson 800132
Borgeson 990012 steering coupler

1973–76: required steering-box coupler

Borgeson 990012 provides the 3/4-inch 30-spline box-side connection and disc. Check the existing column-side connection and installation requirements before ordering.

View 990012 coupler

Match pump output and hoses to the box: Borgeson recommends 2.5–3.0 GPM and 1,100–1,250 PSI operating pressure, with a 1,450 PSI maximum. Modified steering shafts need their own connection check.

Plan the rest of your build with LTAC

Brake selection starts with your spindle and wheel clearance. Cooling depends on the radiator opening, engine and transmission; fuel and exhaust selections also depend on year and wheelbase. Tell us what is on the truck and where you want to take it.

Talk through your build

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Let’s match the whole job

Planning your Squarebody Chevy? Tell us what is installed now and what you want to change.

  • Exact year and model, two- or four-wheel drive, spindle setup and steering connections
  • Factory or aftermarket chassis, suspension and steering components
  • Wheel and tire sizes, plus offset if known
  • Current parts, planned upgrades and intended use
  • Part numbers you are considering and any delivery deadline

You do not need every measurement to start. Tell us what you know and which details still need checking.

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