I own a 93 Chevy Silverado K1500 4x4 with V8 350 TBI 5.7L. so unless Chevy has changed their blocks, i would suggest that naturally your block is a SB 350.
However, since your question was about horsepower, not which block you have, I will tell you the horsepower. The 1998 Vortec 5.7 liter makes 255 horsepower.
About 290 hp.
315 hp 345 torque
300 hp
great truck with 290hp and 410tq at 3200 rpms
For an '84 Silverado, a 350 Vortec engine would generally be a better choice compared to the 305 with a 488 cam. The 350 Vortec offers more displacement, which translates to greater torque and horsepower potential, making it more suitable for various driving conditions. Additionally, the Vortec heads provide improved airflow and efficiency, enhancing overall performance. If you're looking for a balance of power and reliability, the 350 Vortec is likely the superior option.
I believe it is 260 horsepower.
It depends on the year of the vortec. From what I see the 05 is pushing 285hp
The horsepower of a GMC Sierra is 355 hp.
vortec 454,1996 thru 1999-->>>290HP 410TQ
NO. That would be the TBI / throttle body injection engine Not a vortec. The vortec will not work in the 91.
Vortec 6.0L
The 2001 model of the Light-Duty Silverado 1500, had an option of four engine sizes; a 6.0L Vortec V8 engine, a 4.3L Vortec V6, a 4.8L Vortec V8 or a 5.3L Vortec V8. The Heavy-Duty 1500HD comes with three engine options, these are 6.0L Vortec V8, 8.1L Vortec V8 and a 6.6L Duramax V8