Question about No Limit Shock Relocate upper mount

[saxart]

I'm in the process of mounting my No-Limit shock relocator kit and had a question about the top mount location.

The directions say that the that the large 5/8" hole should be 17-5/16" from the rear of the frame. Is this for a long box frame or a short box frame? My frame doesn't have this hole, so I'm going to have to drill it. I thought the rear frame lengths were different, thereby meaning that there should be one measurement for a short box and another measurement for a long box frame, correct?

http://nolimit.net/tech/pdf/63-72-ch...k-relocate.pdf

Also, I think I've figured out that the extra rear overload spring needs to go as it's right in the way of the shock location. That would have been nice to know before buying the kit!

Any thoughts on the measurement situation are greatly appreciated.