I am planning to do the coolant change on our 81 12V-71 TA Detroit's soon.

Here is where I am at so far:
  • I have found a local source for the Detroit coolant.
  • I have also found 5gal containers and lids. The store is uline.com if you are looking for cheap pails!
  • I found a local disposal place that can take up to 50 gallons per day.
  • I also know each engine will be around ~25 gallons of coolant each.
One thing I am unclear on is the exact drain locations for the coolant. Our local mechanic has mentioned there are a handful and I wanted to reach out and see if anyone has a good handle on that so I can know right off the bat how to do it.

Thanks for the help as usual!