Street car, daily driver, bone stock...dial back so you can line up the TDC mark to the pointer for timing. Off a degree or two, who cares.

Race/performance with a degreed damper and/or MSD... no dial backs

Old chrome Sears, Penske,Craftsman, MSD light or self powered Flaming River, although the battery powered units are usually only slightly brighter than a Bic lighter.

And verify the marks are right when you put the engine together.