Horse Power and torque
Stock i beleive they got about 210hp... atleast thats what a google search turned up... Not that it matters much, on a truck that old it'll depend more on the condition of the engine and various components than what it came with.
from what my books say, the 1988 5.8L has 210hp @ 3800 rpm and 310 ft. lbs @ 2800 rpm
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