4 degrees before TDC, is a good rule of thumb. Remember to plug off the vaccuum advance on the dist. Other wise you will bring in the vaccuum, which would activate the centrifical.......
Also, depending on the computer version, you may need to disconnect the computer from the distributor before making adjustments. In the old CCC system, there were two connectors on the distributor, a 2 pin power connector, and a 4 pin computer connector. Manual timing is set with the 4 pin connector disconnected. Of course you would then need to clear the fault code afterwards. I don't think this applies to the OBD-II system; you should check the shop manual in any case.
same as a 350
turn the distributor
You can monitor distributor degrees with a timing light.
The same as it was before.
Will engine run at all if the distributor is not wired correctly
Turn it to the opposite direction that the rotor rotates.
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how do i set the timing for a chevy 350 small block?
NO.
perhaps crank pulley has slipped from original position
The engine will not run.