So what is going to be the weak link that breaks with 150tq increase? The factory limits the car for a reason, whether its to increase the longevity of certain parts, emissions, or some other reason. It's good to know why it doesn't make more power from the factory. Don't get me wrong making more power is cool, and I'm all for it, I just don't want to see your car broken in a few months.
Take my Camaro for example, I removed the limiters and it broke the flexplate. Pretty soon the trans stared slipping, not to mention all the weak stock rear axle issues. 4th gen f-bodies were a case of putting a V6 drivetrain behind a good running V8. However you take my Miata and you don't have those issues, the stock tuning and related stuff limits stuff due to emissions, and you have to try to break stuff as the car can be pushed on the stock parts for awhile.
Just my two cents, I wish you good luck modding your Saab.