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all of 1985 carb Chevy motors were at 4* BFTC except the cali emissions (6*BTC) earlier LIGHT DUTY Apps were 8* on the 35o SBC. This you give a start...

Keep in mind that setting the base timing requires two things. 1.) That the RPM is also base, typically 650 RPM, and 2.) that the computer control for the distributor (four wire connector) be disconnected. If you do not do this, the timing will be wrong. Of course, afterwards you will need to reset the CCC fault code, 24 if I recall correctly, either with a scan tool, or by disconnecting the battery for two minutes.

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Q: What is the timing set at for 1985 Chevy 350 carburated?
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