I did this in a 74 Duster but using Duster buckets. When you take out the bench seat you'll see 4 dimples that would have to be drilled out to install the Duster buckets. Do not use the bench seat hole. Measure the spacing on those dimples and then measure the stud spacing on the seats you have. If you want to use those seats you'll have to figure out where the seat goes and how you'll fit. They, Mopar, used a 4" square piece of metal for buckets at the stud mounts inside the car that were welded down.