I would not have guessed that either. However, a 2wd and 4wd of the same truck shows different oil filters. The 4wd filter did not fit my engine. I have some more investigating to do. It makes sense that the motor has been replaced though. The truck has 190,000 miles on it and the engine is...
So I just purchased a 1994 Chevy 1500 4x4. As far as I know it had the 5.7 TBI motor. It is TBI and appears stock. I haven't tried to look at the casting numbers yet because I just discovered this oddity yesterday.
Since I just purchased it I went ahead and changed the oil. Ordered the...