Dyno'ed My 360..it's a pig..what next?

It needs fuel!

There is a restriction in delivering the fuel. Get the fuel curve right and the power will be there, From about 4K up it's leaning out. Whether it's pump, jetting or something else, you need to find it. Something as simple as the float level being messed up can cause this.

Simple deal, step up the jetting at all 4 corners, if it lowers the numbers at the end to the 13's you are headed the right direction.

Try a different carb if you have access. A known good 750 VS carb would be a good rest piece. The current carb size is NOT the issue.