1800 for the 81 which is pretty complete 34K miles. The 80 is missing pieces but has an 8 1/4 with rear anti sway bar and SURE GRIP 650 for the complete rear set up. I don't know the ratio sorry- I was in my dress clothes on my lunch break
Pronounced Joe Dur Tae....... "Don't church it up , boy"Couldn't get your church clothes dirty.