Hello i just recently picked up a 1991 300zx TT manual it has 198k miles starts and idles great was told it has an exhaust leak will take a video sometime i believe it has a misfire or two im not sure if someone could provide some insight that would be sick

 

As for the exhaust leak, that might also contribute to performance issues, so addressing it could help with the overall running of the engine. When you get a chance to share a video, it might help others diagnose the issue more accurately. Keep us updated on your progress—it's always exciting to see a classic car being revived!