Ive brought a 340 1.7gl the other day but its had the 2.0 engine out of the 480 just wondering is there much change in the wiring, the plans to use the engine and running gear in my 340 1.4.... thanks

Is the 480 not injection? That would be the main difference, but you may need the right ignition computer.

All depends on how they went about it

The car all runs ect is on a carb not efi