Jack at Valley performance and Machine built a 370 ish inch 360 that is under 12 to 1( it will run on pump gas) that made anywhere from about 740 to 780 depending on what dyno it was on.
uses production 360 block, and a very small duration cam(255@50) won a big competition with it. Have posted the build story on here several times, easy to find the info.
it uses Eddie Victor heads.
could make 800 very easily according to Jack with bigger cam, etc.