Wire hiding question

I'm doing a wire hinding project on my 93 lx. I have a mini starter and a 3g alternator upgrades. I'm thinking of pulling off the right side header and running the 4 gauge cable from the alternator to the starter stud. Is there any reason this wouldn't work???

I mounted the coil on the engine since I have 95 mustang front engine dress and running the wires up from the back.

I'm running the yellow and green/red wire for the alternator up from the back. I'l mounting the BAP and starter solenoid in the left fender well. I'm running the main hardness and brake lines under the back pinch joint.

I'm trying to come up with a way of maybe putting the vacuum tree in the cowl area. Maybe by installing a tee from the upper intake and brake booster and then in the cowl area. Any suggestions welcomed.

I removed the windshield washer tank and pump and will need to install one in the cowl area if a small one could be found. It's a requirement for my state inspection.