NUA Reversal - 60-day Rule?

I took a qualified NUA distribution when I rolled over my retirement assets after a job change. After more fully analyzing the tax benefits, I think it would be better to have rolled those funds into an IRA with the rest of my funds given the 10% penalty and only modest appreciation. I am within the 60-day window for indirect rollovers…would it be possible to “unwind” the NUA distribution in full or in part by selling the shares I received and rolling those funds to an IRA (I have not done any other indirect rollovers this year)? If so, would the allowable rollover amount be the amount of the gross distribution?