Is it a GT or a regular Dart in GT trim ?
LL23 = cheapy Dart Swinger 2 door
LM23 = Swinger 340
LH23 = Dart Custom 2 door
LP23 = Dart GT
LS23 = Dart GTSport
LP23 and LS23 had bucket seats and rear trunk panel Standard.
and this was line up for 69 ...other years of darts had different line ups