Hi Rick,
If you can wait a couple of days, I have a fuel filter/accumulator assembly that you can have. I'm out in Annapolis. I bought this as I had originally intended to swap in a 3.0 CIS into my 69E. To simplify things I went with carbs and HPX ignition.
I have the filter/S-shaped fuel line/accumulator/clamps.
Sounds like a fun project; you'll enjoy the extra power and torque.
Have you thought about the oil lines? The line from the engine oil cooler to the oil tank may not be compatible.
You'll also have to think about gauges....not sure if the mid year oil pressure/temp gauges/tach will be compatible with the early gauges.
Regarding the fuel lines...the lines from the front of the car to the back were designed for lower pressures...CIS is a high pressure system...you may have to install new lines in the tunnel which I've heard is a PITA.
I was in your same spot exactly 1 year ago...lots of work but plenty of reward. If looking at my car up close would help (probably not much unless you go to carbs) also let me know.
Later.