See Figures 1, 2, 3 and 4
The engine model is stamped at the right front or rear side at the top of the cylinder block. The engine serial number is stamped near the engine model number.
Fig. Fig. 1: The engine model number is located on the firewall
Fig. Fig. 2: Engine serial number location on 2.OL G52B engines-1979-82 models
Fig. Fig. 3: Engine serial number location-2.6L engines
Fig. Fig. 4: Engine serial number location-3.OL engines