That's a complete 73-76 front end, including k-member, centerlink, pitman, idler, motor mounts, even power steering box. Treat the whole front end as a 73-76 Dart. Also all of the front brakes are 73-76 Dart.
Post pictures of the master cylinder and power booster. They might be lifted from the same 73-76 A-body.
If you order pre bent transmission lines, get them for a 73-76 Dart.