What is the difference between the inner/outer and left/right tie rods?

I bought a kit for an M body and I have these:

ES 352 R
TE-0352 R

ES 355 L
TE-355 L

I'm finding conflicting information about these, basically saying ES 355 is the inner and ES 352 is the outer...but that wouldn't make sense from the paper tag in the package they came in.

Thanks

one's left hand thread, one's right hand thread and they need to be so they can be adjusted on the car, the sleeve has L and R threads to accommodate this.

Thanks

So the thread direction determines whether it's inner or outer...not which side of the car it goes on....correct?

yes

Thanks again

As said you need a leftie and a rightie on each tie rod sleeve and it does not matter which side of the sleeve gets the rightie/leftie tho on the assy line I'm sure there was a particular order as speed/uniformity/efficiency/limiting mistakes is the name of the game there. Lefties have an unmistakeable twist to the threads that cannot be mistaken whereas righties have to the naked eye almost parallel threads. On the dr side I put a leftie next to the LBJ spindle arm and a rightie next to the pitman arm and on the pass side I put a leftie next to the idler arm and a rightie next to the LBJ spindle arm. Get as much thread engagement into the sleeve on each end as you can for security but leave enough threads so it can be adjusted both ways. I get the wheels straight ahead then screw em in pretty much evenly till the tapered tie rod end shanks will fit right into the tapered holes. EDIT & steering box halfway thru it's lock to lock travel first also

RR my kids Express truck came with them nackwards on only one side.It needed an outer so I got a new one.Tried ti put it in and it was an inside on the outside.The DS was correct though.I got POed so I ordered all new and sleeves.Rocky