I have a Mustang with a 408 LS motor and need some guidance on how to set the map timing on the 6LS. Should I put it on a dyno and tune it or is there some kind of way to do it without a dyno to get a baseline tune and then tune it at the track? I know I probably need a wideband to start but I dont have one.

Any guidance will be appreciated. I can give any specs if anyone needs them?

 

Anyone?