Not my ad (nor my version of English). This is a set of 342 gears in excellent condition originally out of a 87 buick grand national but will fit any 10 bolt 8.5 rearend i moved up to full blown race gear so i dont need em askn 80 are best offer 12 teeth on pinion 41 on ring i can be reached at 214-718-2426 http://dallas.craigslist.org/pts/697623482.html