I believe in the manual it talked about a 34.5mm adjustment, but then it was corrected to 36mm - 38mm. The key is to make sure BOTH are the same length. That is way more important than the length itself I believe.
Edit: Just looked in my 2003 Performance Manual. I was close LOL
Minimum adjustment = 36.15mm
Maximum adjustment = 38.15mm
I'm pretty sure it's still 34.5 mm. I just did my Crossfire yesterday....700...and that I'm sure was 34.5 in the mid range. I adjusted to the lower end of the spec at 1 5/16" or 33.2mm. Unless I'm totally messed up here??