Complex sentence: The early MK3 Cortinas came with the same 1300 and the 1600cc engines as the MK2 Cortinas, (except for the 1600CC GXL) these engines are known as the Kent, crossflow engine or over head valve (OHV) engine.
Split into simpler sentences: The early MK3 Cortinas came with the same 1300 and 1600cc engines as the MK2 Cortinas, except for the 1600CC GXL. These engines are known as the Kent, crossflow engine or over head valve (OHV) engine.