Peter you're right about the seat bolts being the lowest part of the car.
My floor is the super low option, which is an inch lower than the flat section
I have used gutter type bolts with very large washer (approx 50mm) on the seat and under the floor and cut them flush with nut after final tightening. I might grab a peice of titanium and screw it next to the floor bolts for the spark effect when she bottoms out. I'm not sure if what I have done is the best way though. The runners under the floor sounds like a good idea.
My floor is the super low option, which is an inch lower than the flat section
I have used gutter type bolts with very large washer (approx 50mm) on the seat and under the floor and cut them flush with nut after final tightening. I might grab a peice of titanium and screw it next to the floor bolts for the spark effect when she bottoms out. I'm not sure if what I have done is the best way though. The runners under the floor sounds like a good idea.