What is the timing degree on a 1985 Chevy caprice 305?
It's 4 degree BTDC ...
A computer controlled distributor on SBC engines is set at 0 degrees. There is a special procedure for setting the timing on computer controlled distributors. Consult the Chilton or Haynes manuals for specifics.
My reference books say to check the underhood sticker for timing. If yours is missing or unreadable, I'd try 15 deg BTC on a 231 cid, and 6 deg BTC for any other engines, including the 262. These are from an 84 spec book. This should put you in the ballpark, anyhow. If your Caprice has the 307, it was built by Oldsmobile. Same firing order as the Chevy V8, but the distributor is counterclockwise.