I HAVE A used set of "bolt in" frame connectors that where on a 1971 duster for 1 month--my buddy took them off and parted the car out 10 years ago---
i would take $60.00 plus shipping for them---in the lower 48

1970 DART B1MC N/A 8.86@ [Email]155 3200 lb on 275 DR 5.30 @ 130 1/8