Crank pulley help

Sounds like you bought the wrong damper? ATI makes a damper that works with stock pullies but they also make a bunch of dampers that have different spacing than stock.

You might be able to change the hub on your damper to get it back in line with the stock pulley or the lower pulley from Doty might work for you. I've used the Doty pulley with an ATI damper before and it lines up with the stock water pump pulley.