Stock -70 340 block with nitrous??

It's technically illegal everywhere unless the vehicle is placarded for carrying compressed non-flamable gas. The kits used to come with a green DOT sticker...lol. Anyway - A friend has a 410 that makes a little over 600, and runs a 175hp kit on top of it. It has held up but the assembly was meticulously done and the parts are high quality and the owner is a dedicated racer with a lot of tuning experience.