Junkyard treasure 360 efi?

Have a 360 71 motor, need advise would i be able to go to a junk yard find a 5.9 L ram Remove all EFI conponents, install in 360. the ram is running a obd2. What major Problems would i be facing in doing so? This idea came to me after finding out prices on brand new plug and play efi kits. I know i'll need CPU, Engine harness, Crank position sensor, O2 sensor, manifold, Throdle body, etc.
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