The 2 original coils have the square hole in different locations and neither of the 2 I have matches the S160 or the S165. I assume there is some importance to the location of those holes. If not please advise.
The S165 is 3/8" which is correct. The S160 is 1/2".
What about the plastic cover? I don't see that you have anything similar to it.
Thank you.
In my experience, the position of the rectangular holes won't matter when hooking the coils together. That's the only function they serve, at the end of the day, and it doesn't need to be exact. Our nylon covers are also not exactly like the one in your picture but should still work with those coil springs.