Seeing the PVs at the race track gave me some impetus to get back to my car.
So last night, I managed to get the rear sound insulation (Hushmat) and carpets and the driver's side seat belt installed. But ran out of energy and the necessary hardware to complete the passenger side belt.
Originally the car did not have seatbelts, the prior owner's two point belts were improperly located and I am going with 3 point belts. So my installation is a bit of a Rube Goldberg. Seems to have worked out pretty well, however.