Where did you get the front LSD? Out of an Impulse or were you lucky enough to snag a power brute? I'm debating if I want to swap gears or not, with the MUA5, in 5th it will be about the same RPM as stock 4L30E with 255/55-18, both with 4.30's. I've debated going 4.56 or 4.77 but not sure I'll need em' when I do the tera-low's.