It's been a long couple of weeks and completing the seat mount took much longer than I had anticipated.
Getting ready to box everything in...
...and done. No in-process shots because the welds are exceedingly ugly. Apparently it's quite hard to weld 1/8" flat stock to the floor. I'm still practicing!
A shot that shows how everything fits with the seat in and the carpet down:
The seat is literally as low as it can go. I reamed out the lowest rear hole in the brackets and now the seat is basically resting on the bottom plate of the brackets (< 1/16" clearance). Without a helmet there's about 2 to 2-1/2" clearance between my head and the headliner.
I took these next two shots to show where I want to anchor the lap belts.
Door side:
Transmission side:
I want to use the stock lap belt anchor points as there are reinforced from the factory. My concern is that the mounting points are too wide. The factory anchor points are about 1" from the seat on the transmission side and 3" from the seat on the door side. With me in the seat and a mock lap belt (old guitar strap) the angle is about right (> 45 degrees from horizontal). I can always make new anchor points, which are more inward and use backing plates but I'd like to avoid putting more holes in the floor! Thoughts?
Also if anyone has an old/cheap/expired 5 or 6-point harness lying around they don't need I'd gladly take it off your hands.