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What is the most amount of hp and tq a stock 6.0 and 6.4 and 7.3 and 6.7?

My granddad and dad have a 2003 ford f350 dually crewcab lariat with 7.3 diesel with swamps motorsports injectors and tune and Brian's truck shop transmission making 450hp and 1300 tq and I'm going to do a 6.7 cummins swap but want to make 4k hp out of the 6.7 cummins using D&J Precision Machine...