Wire up a 5.9 FI Magnum to 60's A body.

What is the PDC? Guessing maybe the under hood computer?
There is only one “computer”. That is refered to as the ECU. Dodge’s name for their ecu is Jtec. The PDC is the power distribution center with all of the fuses and relays contained in it.
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This is a PDC from an 01 ram 2500.
The arrow was for a previous post but it’s pointing to the 12v battery source that powers the PDC.