I have a 2002 GT With 130,000 miles. How long will this last on my current engine? I would assume some depends on the degree of driving. But used as mainly a daily driver with the occasional strip run and racing across our well known Bagby Run. Lots of curves.
As long as the engine has had a good service history, it will hold up for a long time. I had a blower on a 96 with 200k miles and as far as I know, its still holding up well with the current owner. Maintenance and how you treat it will be what dictates how long it will last.