Found my dads original 1971 duster!

Ok. Thanks. So if I find someone to do it, I should tell them to set it to 16?
Short answer....no. Every engine is different and timing needs to be set according to each engines parameters, you shouldnt just take 16 as a number and set it there. Anyone who is experienced with tuning engines should be able to time it for you as part of a complete tune-up. Chances are that it may end up around the 16ish mark though :)