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1. The next major change to our engine was the addition of a direct port nitrous oxide system from Nitrous Supply. There are several ways to add nitrous to a big-block Chevy, with plate systems being one of the easiest to install and most popular. We went the direct port route though because our intake manifold has a few distribution issues, which result in the corner cylinders running leaner than the middle ones. In naturally aspirated form, this isn't a huge deal and the engine runs fine, albeit on the brink of detonation. We didn't want to take any chances of hurting the engine on the bottle, so we went with the cylinder-to-cylinder tunability of the direct-port wet nitrous system.