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After baselining the engine as it ran in the truck, the crew at Westech Performance upgraded the GMPP 290hp engine with the parts you see here. Highlights include a Lunati Voodoo 268 camshaft setup, Lunati self-aligning Voodoo roller rockers, a Weiand Stealth Air Strike intake manifold, and bunch of stuff from GM Performance Parts including the assembled Vortec heads, heavy-duty pushrods, circle track valve covers, and other goodies you'll read about next month. Note the green packages in the foreground. We used E3 spark plugs for all of our dyno testing.