What should the timing be set at for a 88 Camaro with a 350 TPI and automatic tranny?

 

If you look under the hood you should have a chart telling you what to set the timing at, usually around 6 degrees advanced. But don't forget to disconnect the wire by your air conditioning box. I'm sorry I can't remember the name of the wire, but if you take a look at a Hayes manual, it will show you exactly what to look for.

 

6° BTC in DRIVE at 650 RPM - EST bypass disconnected. It's all on the VECI label, like felo said.