Adjust timing on 1985 olds delta 88 307 engine

Timing set a 20 degrees as factory specified.

Keep Backing off of timing 1 degree at a time until you don't have a pinging during acceleration.

Laging valve timing can not be fixed by simply advancing the ignition timing.

Check to see that you have less than 8 degrees of valve timing and you will be ok.

Hope this tip helps

R/
David