Look at the plate,it will have a number on it., double it for crank degrees. here's a list of dist degrees and slot length.
Mopar slot lengths
3 0.295
4 0.310
5 0.325
6 0.340
7 0.355
8 0.375
9 0.390
10 0.405
11.5 0.420
12 0.435
13 0.445
14 0.460
15 0.475
16 0.490
17 0.505
18 0.520
Whatever mechanical you want, divide by 2 and make the slot the length it says above.
