Need help perfecting the budget build hemi swap

I'm not certain how this works yet. If it's a live feed that goes to the amp-meter, feeds the fuse box, and than feeds the components. I'd like to go back as far as the fuse box, and remove stuff like that EGR, spark timing job, or anything not needed. I'm not sure if electrical dead ends lead to future issues. I seem to keep car for a long time. Dispite the fact that I usually tens of thousands of miles on them. I'm glad I asked the question, I got good info from everybody.
The module behind the washer tank looks like the ignition module to me, if it has a four or five wire connector in the shape of a pentastar then that is the ignition. It is kind of hard to tell, but I think number 5 is the voltage regulator, they should have a triangle shaped connector. Number 1 I think is something like an egr delay module or something like that. Number 2 I am not sure of, unless it is the voltage regulator and number 5 is the unknown. Hope that helps!