Also a correction from the above post . It was a 93 V-6 dakota that I tried advancing the time .
Tuning the dist has no effect on the timing until it is turned far enough and it will cross fire . On a V-8 this cross fire equals 45 degrees . On a V-6 this cross fire equals 60 degrees and will kill the motor .
Very easy to test on the vehicle you intend to buy . Loosen the dist and start rotating , nothing will happen until it kills the motor . The 87 dakota and earlier will start advancing gradually as you rotate the dist.