little 'ol 273

You could get some liteweight pistons installed at zero deck to raise the comp. A set of 302 heads that are prepped and have a closed chamber for a good quench. And a very good modren cam ground with the small cubes in mind. Headers and a electronic ignition syatem. All the things I planned to do to my 273, but didn't.
These things should get you close to 300 horse.