The code-WT 400ci is completely original with the exception of a handful of bolt-on components. Michael installed Pontiac’s 041 cam in the early ’70s to boost performance. To let the engine breathe easier, he replaced the original single-snorkel air cleaner with a dual-snorkel unit and added oversized Ram Air exhaust manifolds. A Pertronix conversion was used inside the points-type distributor to increase reliability. The engine is otherwise as Pontiac built it.