The only good modern Chevy SS models are the Monte Carlo and Impala SS, the Silverado SS, and the Camaro SS. All others (Trailblazer, Cobalt, Malibu) suck.
425hp 409c.i. V8 w/ dual quad carburetors
375hp 396c.i. L78 V8 w/ solid lifters
450hp 454c.i. LS6 V8 w/ big Holley double-pumper & alum. heads