LA 360 or 5.2 magnum

THe 91.........Easy to tell......count the valve cover bolts and look at the intake bolts. Do the intake bolts go "straight down" plumb like a flagpole, or are they "canted" with the head angle?

Should be an LA "roller block" IE roller cam

Even as old as a 91 is, it could have a different engine in, by now!!!