Mopar had two different sized leaf eyes. It is possible your springs got swapped out at sometime in its life, or when it was assembled they simply grabbed the next set available and put them on. I've noticed the larger eye springs tend to be on older, pre 70 cars, but nothing is an absolute with mopar.
Two options, take your 2" to a shop and have them turned down to 1.5, or pick up another set of 1.5" units.