Do you consider a gen III a SB? The engine masters make 700 with them and they have RPM limits and cams are basically mandated by rules to be on the very short side of duration as well as very conservative compression limits. Throw in 30 degrees more cam, 2 points more compression another 20-30 cubes sheetmetal intake more liberal port size and I think it could be done but like Monte said you may get it on a dyno but in the real world who knows till you try it.

If inline wedge is it than a W8 is the only way to stand a chance.