there are various dyno posts out there saying those Victors can make good power. Who knows.
the guy who does my stuff built a 376 inch 360 with Victor heads, limited cam(255@50) and limited compression( under 12) and won a competition with it.
Jack told me if there were no rules he could make over 800 easy with these heads without any trouble. More cubes, more squeeze, more camshaft just some of the areas ….
