Delta has 7 777 aircraft. 7008 will be delivered in March of '02, 7009 in March of '03, and 4 more in '03 as well.
The 764's do not have PTV's in E/C. They are not covered. They do however, have the PCU controls for them in E/C. They were delivered with the aircraft from the factory and are only being re-orientated through the E/C seat enhancement program, which for the 764 is complete! No PTV's were installed in the E/C enhancement mod.
The 764 F/C cabin DOES have operational PTV's on all 36 seats. They were originally delivered with the aircraft as well. ILUV767 is correct, no PTV's will be installed in E/C while the plane is flown domestically, and there are NO plans to place the plane into international service. That would require a BusinessElite mod.
Delta currently has 16 764's with 1817 & 1818 slated for November deliveries, and one each in January, March, and April of 2002. That will complete the firm commitment of 21 aircraft.
I do not have information on the registration numbers off hand sorry.