My 273 turned out to be a 318...what did I buy?

serodgers66 said

The hose on the passenger side is the fuel line to the electronic pump mounted to the frame rail out of view. The red wire is the feed to that pump. Certainly an opportunity to clean up the wiring. I appreciate all of your insight and time. This is so helpful for someone with limited experience. I am an engineer by trade so I want to digest and understand all of this. I have the factory manual, Stockel's Auto Mechanics fundementals, and Peterson' Automotive Troubleshooting and Repair Manual that I have been diving into. But being able to ask real people about things is much more helpful. Thanks again!

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I was afraid it might be hose for fuel. I was hoping the fuel filter weas getting fed from the mechanical pump that was hidden in the shadow.,
Only reason to run an electric fuel pump would be if the cam is lacking the eccentric. But that long hose suggests the steel line has been cut short.
IMO the main issue is long runs of rubber hose - mostly safety thing.
Electric pump brings its own issues with the factory wiring strategy but can work. That can be a thread of its own.
Those books are all good for the basic understanding.
Supplement that with factory service manual, and there's a host of factory TSBs, and technician's tips at Hamtramck Historical Library
Imperial Club Master Technician Service Conference - Chrysler's Training for Mechanics and www.mymopar.com