I time it till it pings then back it off a little, but with the gas we get now. I might have to adjust that a little further. Gas here in California sucks. Anyway, stock timing will be good for starters then advance as needed. Before timing is set though you need to check the points for proper gap. (dwell) Remember this: DWELL WILL EFFECT TIMING, TIMING WILL NOT EFFECT DWELL!
have your vacuum advance checked and also see whether your centrifugal advance is working. Total advance should be around 32-36 degrees at around 2700-3200 RPM. Most Pontiac engines of your year were at 6 Before Top Dead Center (BTDC)
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