Rear spring question

Besides changing the pinon angle. What effect would moving the front spring eye down about 1 1/2" or so?
I have the offset spring hangers on the car, and they prohibit me from using the upper hole on my caltrac.
Two options, drill new holes lower in the front spring hanger, or cut the lower edge off the hanger. If I just cut them off, the caltrac front pivot can only move 1/2" to maybe 3/4" forward. If I drill new holes down farther it would have a longer travel clearance.
So, effects of moving hole lower?