JDMopar, if you did not know......
The rear tie down brackets were intended to remain there - but there was an issue with them being installed on the wrong sides at times.
There is a 2 page TSB on it at
http://www.hamtramck-historical.com/images/TSBs/1970/D70-13-1 page1.jpg &
http://www.hamtramck-historical.com/images/TSBs/1970/D70-13-1 page2.jpg