GM's first-generation Vortec engine was derived from its fuel-injected predecessor, the throttle-body fuel injection (TBI). Both the TBI and Vortec engines used only ... BBK for a high-flow ...

The new firing order of 1-8-7-2-6-5-4-3 ... a shiny new crate engine or a used 5.3-liter that you yanked from a wreck? High-end billet drive systems or a repurposed GM serpentine drive system?