Structural Strength

Hey guys I was hoping somebody could give me a couple suggestions on how I should build my roll cage. I did a drawing in paint with a picture from a factory service manual and made it so It was jsut a bare bones frame. So heres the drawing. It's all triangulated and hopefully it'll be strong. I want to build the cage and frame so that it's as strong as possible because even if just for now it's going to have a 318 I want to have it so I can have a bunch of options for motors, etc. whether it's a 300hp 318 or a 1500 hp blown hemi.

proposed roll cage2.jpg