need measurement for 4 link

[68 charger freak]

so  i finely got my martz chassis 4 link for my 68  last week ,and I'm trying to install it but i have a problem. I'm not sher about the location of the rear end housing so i was hoping that i could get a measurement from the frame where the front leaf spring hanger gets bolted  too the the center of the hole of the leaf spring perch . cheers

[keepat]

25 3/8" to the center