Do you know if ANY E-Series ever had it??you need to check it for sure, I bet you still have the old style fitting.
It's a little bit more troublesome removing the heat shield off of the hpop cover. the IPR is 1 3/8" or 35-36mm will work if you have a wrench that big.
I believe the jam nut connector did come out in late 07. it's pretty safe to say no 6.0 trucks ever came with one