Yes, the link between the pivots is the same for 2-spd and 3/V-spd and is 3431103 for 71.
Yes B and E use the same motor, crank and links. Pivots and wiper arms are different.

72 Satellite Sebring Plus 440, 72 Dart 5.9 4-spd, 68 Valiant, 73 W200, 78 D100 sb, 78 D200, 98 DAKOTA, .
Moparmarks Parts & Restorations
Desert Mopar Metal
Grand Jct. CO
970-261-7039
http://moparmark.com/
motormangj@gmail.com