IC
Those are good measurements and an excellent picture to let us see your setup. When I do the calculations, your IC is actually about 61" out and about 8 1/4" up. The IC is the intersect point of the two bars if you continue them both out in a straight line forward. So that along with having the bars in the holes closest to the rear end housing is what is causing your less than favorable 60fts.
If you move the top bar up 1 hole in the rear that would move your IC to about 49" and about 8 3/4" up. But it would be best if you could also lower the rear of the car down about 1 1/2" to 2" and then move the bottom bar down one hole at the rear end housing. This would move the IC out to about 43", but would give a little bit more leverage from the rear end housing onto the chassis.
That would be the adjustments that I would do first and if I wanted to move the IC back out to about 49", I would then move the top bar up one hole in the front.
Bill Mitchell