Rev summit skid CTC? (installing HOLZ)

[t300]

anyone know what the skid CTC is on a rev chassis *summit*, lets say 06/07 sc4? Putting a holz (rev) skid into a 06 440 chassis. I have Holz's original instruction papers for this but they just reference existing (summit) mount points and don't say what actual center to center should be. (just say that the rear arm should move 7/8" forward from the stock mounting position). Using an original rev spec Holz skid, not the newer alpha-x.

thanks

 

[t300]

Research shows the summit skid ctc is 31.75.