I run 1" bars on a lot of 72-older B's and E bodies and really like them. Beings that the 73/4 B has a heavier front end I'd think the 1.06 bars would be the ones that I'd use.
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