Gentlemen,
Pure and simple. If the upper control arm is ahead of the lower, it is a design flaw, its not right, its not ok, and its by no means normal.
Since the system is using Ford parts with Ford geometry, we can assume that the Ford engineers actually knew what they were doing. My guess would be that the frame builders have placed the mounting point of said control arms in the wrong place on their frame, i.e. to far foreward.
My experience with these cars has been that thier owners have had to dial in upwards of 9 degrees caster in order to get them to track at speed, Ouch!
My question would be; if something so basic as control arm relationships is that tweaked, what do the more complicated geometry equations look like?
Just my two cents, as if I know anything about chassis and suspension geometry...
Rick Rllis
HDR