Link does not work. AbodyJoe pasted up a magazine article some time ago that covers this.......Post 28
how much initial timing mild 360 magnum
Crackedback came up with a chart that shows some idea of stock distributor slots to degrees advance.......
Dimensions for Mopar distributor slots, in DISTRIBUTOR degrees
Modifying advance slots
degrees / slot size
6.............. .340
7................355
8................375
9................390
10...............405
11.5 ...........420
12...............435
13...............445
14...............460
15...............475
16...............490
17...............505
18...............520