I'm 90% sure that they will fit without issue.. the slightly bigger rear wheels that you will need from a later model sled will help to take up the 1/2" rail difference.
The edge rails that I got from 4Z bolted onto my IQ chassis suspension... Since all the parts on the 2006 suspension (arms/shocks/scissor) bolt onto the 2009/10 and vise versa... I would say that rails will bolt on and have the adjustment you need in the rear.
if you have 156 rails you can move it back and cut the front, it would be cheaper and easier, since you will have to cut the front on the 155 rails anyway
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