While the floor is out, it's a good time to address the transmission oil that has been slowly leaking out around the speedometer gear drive. The large plastic bushing slips on over the brass portion, the driven gear (not shown) in inserted into the bushing and mated with the tang protruding from the brass, and the assembly is inserted downward into the transmission.
The O-ring visible on the brass is worn. This is supposed to be the only O-ring in the assembly, but I added another one in the groove near the big end of the plastic bushing. This tightened-up the fit and added a second line of containment.
Harry Martens, who is probably the world's leading expert on this type of transmission, suspects that oil leaks here because in the Lotus the transmission is rotating in the opposite direction to which it was originally designed, which results in the speedo-drive gear slinging oil upward toward the drive unit.