Here are a few pics. For the retractor I made a bracket that ties into the seat bulkhead, the adjustable seat mount studs, and through the floor. There is a bracket under the floor that welds to the cab mount bracket. For the shoulder mount I plug welded a couple plates with a welded nut behind the door/window frame, a typical technique. I machined a bushing to allow it to pivot accordingly. For the latch mechanism and lap belts, I made a couple brackets that go through the floor with a couple accompanying plates under the floor. Most of my floor is 16g metal that bends up at 90 degrees and marries the seat bulkhead, so it is plenty strong.
