My 5.3 LS swapped OBS with Texas Speed Chopacabra cam doing a cold start in 12 degrees after a good snow fall.

-89 C1500 scsb
-5.3 dbc lm7
-700r4 trans
-TSP Chopacabra cam w/ LS6 springs
-Hummer H2 intake
-Taylor Spiro-Pro wires
-Schoenfeld long tubes
-2.5 equal length exhaust
-X-pipe
-Magnaflow "bullet" style magnapack mufflers
-Belltech 4/5 drop
-Belltech Street Performance shocks
-15x8 -19 D-hole steel wheels
-245/60 F & 295/50 R Cooper Cobra tires