[MrBills 911]

I have a fairly low mileage 76 911s with original engine that runs well just drips a decent amount of oil. I will be pulling the engine for reseal at some point but also have a 2.7 twin spark engine that was built for another car I sold. My question is would the modified engine swap help or hurt the future value of the car as long as I held onto the original engine. Five years ago I wouldn’t have put much thought into it as it is just a 76 but now I’m starting to second guess altering anything from stock.