Trying to get Power out of a 225

hello, I'm building a slant six and so far have the head getting ported polished, new valves, etc. I also have a cam with 264/264 duration .440/.440 lift. I'm also most likely gonna get the crank balanced and see what I can do with lightening the bottom end up. any tips on what else i should do? looking for a good street/strip engine nothing to crazy. 300hp area would be nice. thanks!

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