Nitrous on a 318.....how much will it take

After posting this, I bought some old back issues of Hot Rod. February and March of 98. They did a story called Bottle Bomb where they put a bunch of nitrous to a 318 they pulled out of a yard. They blew it up after several 150 shot passes, but they were doing it clown shoes. projected nose plugs, no progressive controller, no rpm switch, lots of timing, stock converter.