2 words decribe it. Big and Heavy. The engine is pretty massive coming in at 3.9L of displacement. It does not share a transmission bolt pattern with anything offered in a smaller US spec vehicle. It may be similar to a 4M40 but that's just speculation.

89 Conquest - 2.4 DOHC <--Thats right DOHC Turbo and MPI.
87 Starion flatsider - under restoration
87 Conquest - Saved from the crusher
86 Conquest - Another crusher rescue
88 Conquest - Previous owner abandoned project
87 Raider - under construction

86 Conquest - DD