I'm trying to scare up some NOS conventional Delco Power Beam headlights from a local supplier, but they have superceded the part # with a GE part. If I give them the original GM Part # they may be able to get them. I'm looking for the large round hi/low beam for a 2-lamp system (like on '71 & later Chevelles plus '70 & later F-bodies & Monte Carlos). They carry a diode symbol in the center of the lense with 'Power Beam' written on it and GM on the very bottom. I know the 4 round lamp system used 740099 4000 & 740100 5001, if that make sense to anybody.