I drove her around the subdivisuon yesterday after installing a final clamp on the exhaust, and I can say this with certainty.... she'll at least be as fast as she was with only 3 cylinders!
I didn't want to drive too fast in the subdivision, but she felt really nice at even only 5psi. And she sounds different.
I am anxious now for tomorrow to get her inspected and registered.
And in other news, my Spirit must have been jealous of all the attention given Slug, so she decided to puke out all the power steering fluid. Now I need to see what broke on her...