Opinion for putting in bucket seats

I picked up some cheap unidentified seats I thought I could use for my 73 duster.
I was hoping someone could identify them and for advice for what DIY bracketing I need to fix them to the floor.

I have tools including a welder if I need to make brackets. I didn't want to just start in before I heard advice from people who have done this before.

(The 73 duster originally came with bucket seats. I see divots in the floor pan where it looks like spacing for plymouth seats.)

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