I am not sure what the floor was like on the car these seats came out of, but it must have been a real mountain range. The right rear support is a real monolith. After measuring, it was a apparent an inch had to go. After cutting it, the tab needed to go. It originally mounted the wiring harness. That's OK because it needs to be rerouted anyway. After welding, the seat fit a lot better. It still needs a lot of work before mounting, but at least I know the driver's seat will not have to move because of the passenger seat.
Well, the 2009 family vacation is in the history books. Flew to Phoenix via Dallas. Put over 1800 miles on the rental car over 8 days. We visited with friends that moved to Gilbert years ago. We don't get to see them often, so it was great to spend a day visiting with them and their family. Saw the Grand Canyon, Petrified Forest/Painted Desert, Meteor Crater, Flagstaff, Sedona, and met a real interesting WW II war hero.
So, back on the 41. To be honest, I was a bit apprehensive about the interior. All my previous cars had basically stock interiors. The exception was my drag car. Of course, the drag car only needed to be functional for limited periods of time. If I get the driver's seat, steering wheel, and pedals wrong, it will mean misery for miles on these OK roads. If I get the passenger seat wrong, it will be worse!
Anyway, with the seat in the mid position of all adjustments, I centered the seat and marked the mounting positions. After marking them, I removed the seat. It was then that I realized the holes would have gone into the floor braced. I moved them forward about 3/4". The green squares are the original marks and the red X's are the locations to be drilled.
Three of the four mounts rest on the floor. The left front will need some spacers. For now, I stacked washers. A quick test sit and it feels good.
I decided to test the passenger seat before proceeding. It ended up sitting high and leaning toward the center of the car.
The tube was tack welded to the side plates with the dash in place. Then everything was removed and the tube and plates were finish welded at the bench. After welding, it was bolted back in to assure it still fit.
The dash was installed and the seats located to determine an initial driver location. A little fine tuning to determine the centerline and then the steering column can be located.