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There's really no comparison between the computer controlled injected engines available now versus an old carburetor one. Coupled to a brand new DP drive, well it gets me all goose bumpy. The trophy is a heavy boat and needs all the ponies you can throw at it. Just wonder if you're 16-18 grand serious about a repower. You can do a LOT of tweaking to what you have. Consider a Vortech supercharger (with air to water intercooler). You'll add 50% more power for about a third of the cost of a repower.