f100 with jag ifs

I have a 54 f100 im working on and im fitting the xj suspension.
my question is the centerline for the jag stuff.

I have the center of the wheels set up at 19'' back from the center of the front spring perch hole and i test fit a fender and the wheel is not centered.

Does someone have a dimension? or somthing better that i can go off?

 

Dig around in here... http://www.jalopyjournal.com/forum/group.php?groupid=855

 

perfect thanks, i didnt know there was a group!