Did not realize 3 speeds were avail. in E bodies..............

I believe they also put 7 1/4 rears in some in 1970 only. I think the slants were 70 only.
I've owned two /6 E bodies... One was a 70... The other was a 71.... The 71 actually had a 198 not the 225... Both were auto on the column & both had an 8.75.... The 70 had/has disc brakes...