my mirada came with a lockup 904, and it was a real pain on the track...it was basically shifting 1-2-4...[:@]

which is why we went with the 727, but if im not mistaken, the 904 has a lower gearing...

i "lucked out" with my sb 727, as when i bought my 340 block, the guy asked if i woudl take the tranny too...