I bought an 80 rack so I could replace the # 4 on my 82. Surprise,the #4 mixture screw tower is broken. I wanted to replace #4 because the po had let them seize and then tried t free them up by beating on all the butterflys. So now,I have 2 #4 bodies that are junk and the rest of the 82 rack has butterflies that dont close up completely. Maybe I'll just try and work with the original#4 and see if it will work. What a nightmare. I saw a set of seperated 1100 carbs on ebay,except the jerk completely disassembled them,pulling out the shafts and all. Now selling each piece,screws,shafts butterflys,jets ... seperately. Jeez