stock the 5.7 vortec's had 255 hp and 330 ft pounds of tourque
not enough
230HP
The book shows your 1993 Silverado is rated at 210 hp.
a 1997 f250 has 250 hp
57 hp.
I don't think the 2008 silverado came in a 5.7 L. I could be wrong though. The 5.3 L has 315 hp and the 6.0 L has 357 hp stock.
300 hp
210 hp from the factory
325 hp 6.0 liter
270 hp
210 HP
5.3L V8 is 285 HP @ 5200 RPM