Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Engine Code Location
Engine code letter is fifth digit in a thirteen digit Vehicle Identification Number, stamped on a metal plate which is riveted onto upper left corner of instrument panel and visible from outside vehicle. The code letter is also stamped on left front of block next to water pump on 350" engines, or on left rear of block behind intake manifold on 500" engines.
| Engine | Code Displ. & Carb. |
|---|---|
| R | 350" V8 |
| S | 500" V8 |
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.