Stupid Question, Need Input

[FritzDaKat]

I used to be able to tune my old Dodge by ear, but I wouldnt try to get anything dead on that way with the Mustang. Just remember 10-15 degrees goes by really fast when rotating the distributor. If your pretty sure of what point your timing is set to currently, just index the base of the distributor down to 5 degree increments. (An outside caliper and a protractor should do the trick) Or at least draw a circle of an equal diameter to the base of your distributor and get a look of how much travel the base will have when turning it a few degrees. Mabey even take a measurment of how many degrees you wish to advance / retard the timing off that circle and pre-mark the base of the distributor.