Modifying C Notch ?!

[Dwolfe]

Hey guys! Need some advice! I'm doing a front 2.5 in z / truck is on drop spindles, and full air ride. But to get my truck super low, i have to modify the previous owners step/c notch ( not sure what is tbh) but i'm not sure what is the best route as far as design/strength. I want to do the truck right?! I have thought of a couple things, I could cut were the top trapezoid starts and add in metal to make it taller. B do a 6" c notch on top of the existing notch. C start all over. Just not sure! any advice check out the setup thanks guys!