73’ 318 dies under accel with new intake & carb

Hey all, been racking my brain trying to figure out what’s wrong. Recently put an edelbrock intake and 4bbl carb on my 318 and it needed some fab work to the kickdown and throttle linkage to fit right. However now there’s a massive dead spot in the throttle when accelerating it bogs and dies, timing is spot on and has brand new plugs. I adjusted the accelerator pump for a bigger/smaller shot and nothing worked. When you step on it, it hesitates and then pulls great, just very confused as to what could be wrong. Any advice?