I have a b17 with my ls trans, I love it, you can top out higher and get the same or better mileage as your ls motor. You can do like 45-50 in first. And drop second gear at 60 on the freeway and take off!! You'll be happy. Ya, you get better acceleration with the lower gearing in the other tranny's but not by much. And when you beef it up and put more power down, you'll want the longer gears anyway. Less time wasted shifting, more time vtakkin' lol