RamSound, here is a little app that will give you an idea of the gain you will get. I have no tacometer but think at 70 I am at about 4000 RPM. This link and application says the drop in RPM on a 19 is about 400 thats significant. If you don't know, your rear is a 44 tooth. Hehe if that is correct the TBA will then have a top end of 130.
Calculator
