The Stovebolt Site Forums The Shop Area Interiors 1952 3100 seat swap

I'm not sure how you plan to mount the seats to/through the 1/8 inch sheet but the inner mounting points are going to require some sort of solid spacer between the sheet and the original floor. The mounting bolts should go through the original floor with large washers of heavier steel on the bottom side.

How is the height of the seat with it sitting as shown in your pictures? If they are power seats are they up or down in their adjustment range currently. In my case I used 90's vintage Chevy truck seats (manual) but wanted to raise them so I built a frame that was attached to the cab floor. My bolts (all except the inner front ones) go through the floor with large heavy washers on the bottom side.