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 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.
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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.
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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 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.
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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.