fuel injected or carb?
Fuel Injected usually around 6* with the est wire disconnected.
Carb, factory is 8*, but I have found it varies from motor to motor and anything from 0-22 is acceptable. However I would suggest around 12 for a stock 350.
8 degrees.
8 degrees
4 degrees advanced.
8-10 degrees
The vacuum canister can advance 24 degrees beyond initial timing.
8 degrees before TDC
8 to 10 degrees.
8 to 10 degrees
Depends on what year 350. It can be 2 degrees BTDC or 4 degrees BTDC. I would try 4 degrees and see how it runs.
4 degrees advanced, or BTDC.
8 degrees BTDC.
I belive it is 4 degrees advanced at 500 rpm