Switched 12v source

The car in question is a 71 Dart. So best bet is one of your recommended BBK3601BK distributors with a matching coil, Tying the blue/brown together or finding a switched fuse source and be done with it? Will this distributor with FI Tech timing control?

This is the one you want for timing control.
PRO SERIES 2 WIRE DISTRIBUTOR | MOPAR SB 273-360 | V8 ENGINE | BLACK CAP

With this rotor.
MSD PHASABLE ROTOR FOR PRO-SERIES BILLET DISTRIBUTORS

Only way to do timing control the "right way" IMO.

The PN you meant to reference in your post, BPP3601BK ( the little hei ) will work, but only in a fuel only setup.

And I do prefer the E core type coil. No oil in it to get hot, or leak.

IGNITION COIL | EXTERNAL E-CORE | 50K VOLT | BLACK

Anything I can do to help let me know!!