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Once all was completed, we fired the engine and set the timing. Since we marked the distributor, it was close to right-on, but we used a timing light to make it perfect. GM recommends 6 degrees if initial timing for '85-'88 cars, but Chris sets them to 0-2 degrees. He says they run smoother and have better low-end torque. The '89 and newer L98s were designed to run with more timing. We also drained the oil and installed a new filter and oil.