The engine

Possible choices are:  C = 2.2L (134ci) Carb I4 (The last assembly date is 6/15/88)
                       K = 2.5L (153ci) EFI
                       G = 2.5L (153ci) TBI I4
                       M = 3.9L (238ci) Carb V6
                       N = 4.7L (287ci) EFI SOHC V8
                       P = 2.5L (153ci) I4
                       T = 5.2L (318ci) CNG (compressed natural gas) V8 
                       X = 3.9L (238ci) EFI V6
                       Y = 5.2L (318ci) EFI V8
                       Z = 5.9L (360ci) EFI V8
                       5 = 5.9L (360ci) EFI (HDC) V8
                       8 = 5.9L (360ci) Turbo Diesel V8