Replacement Engine “S”

[Balisong]

Hello all. I am helping a gentleman sell a 1982 928. Very early in the car’s life the engine was replaced. It was replaced with an S engine. I am attaching a picture of the replacement engine. It’s my understanding that because of the different fuel injection that this makes the car better performing and perhaps more desirable. I just wondered how enthusiasts see the car since it’s not the original engine but it’s a “better”engine.
Thank you