bucket seats and console.
As mentioned before - the location for the inside holes on a 71 car are big dimples in the floor board... just drill them out. Outboard holes are located by looking at the under floor pan bracket that the bench seat studs go through. There is a second hole in the bracket welded to the floor pan - just drill it out from the bottom, and then remember to get a set of the rubber plugs that go in the bench seat holes. Those plugs are still available somewhere - I bought 4 of them 6-9 months ago.