Quote Originally Posted by glennsexton View Post
You're making this too hard. Positive battery cable to the starter motor then a #12 from the positive post of the battery to your switch with a 20 amp inline fuse. Switch to push-button to "S" terminal in the starter solenoid. #14 (or larger) from energized side of the switch to the BAT term on the distributor. See below

Glenn
Yep, this is better, one power source instead of two separate ones.