Bucket seats

I put a set of thoes in my 69 Dart that i had 24 years ago.Now i have my 3rd 69 Dart and put 68 cuda seats almost in it just recouvering them now.Is you car a bench seat car now? if so you will need to drill holes in your floor witch you likly know now.Thing is and i LEARNED here that you need to weld plates to your floor.I have a post either in members rersto or body and trim that redfish showed thoes plates.trust me he may have saved my life and my whifes life.hope this help.