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Message: [QUOTE="Charles, post: 470905, member: 103"] Remember when anything over 400hp was just lunacy on a stock 7.3 longblock? Apparently some people still live there, lol. Also, more people than can be counted drive 500+hp stock longblock 7.3's on a daily basis. Many of them towing, a few of them towing HARD. I was one of them for a number of years until I cracked a piston. It was thermal, not from cylinder pressure but heat. Never did I scatter that bottom end. The truck dynoed 544 in that state of tune and was driven MERCILESSLY for years. After the piston cracked I drove on the rest of the day, went to dinner and drove into the shop. A new engine went together and it was again driven MERCILESSLY once again, lol. [/QUOTE]

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