Zetec is the better way! It's much work to build a ZVH and it the parts needed for the bottom end can also be used for the Zetec. And it benefits from its 16V. EFI won't work unless you use RST EFI. The only problem on the 16V is to get an exhaust manifold. Just put enough money in, buy a Weber Alpha or something else and have much fun with a 16V