Looks like you have a 360 balancer. You need the one that says "440 cast crank only" on it. 400 balancer won't work right. I have a rebuilt one. PM me if your interested.

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