1968 to 1981 Automatic Transmission Won't Go Into or Slips Badly in Reverse
Yes, you are fortunate there is an adjustment!
64 220se coupe bogs at full throttle and seems to run a little ruff at other times. when it does bog it sort of feels like it dies for a second or 2. i'm not at all familiar with this old fi system either. it doesn't backfire. the rest of the performance seems ok.