You don't need to swap anything. The computer doesn't know what engine it is running - it has no "awareness". If you are satisfied with whatever year and refinements are in the electronics that are in the destination car then leave them. The easiest of the easiest is to use a FD from an early Euro. No computer at all. It will run an engine all by itself on an engine stand with no car in sight. All you need is fuel pressure and spark.