It seems to me that when the Law is presented to be do-able, you will always find faith in the thing that helps you do it. It can never be a faith that cleaves to Christ. Once the Law is believed to be do-able, faith will be directed somewhere else, but not to Christ.
Of course, there is a view that what we are freed from is not the whole Law but only that part of the Law which is ceremonial, they say that this does not include the moral Law. That one you have to do by the grace of God, so they say.
I simply find that hard to believe, based on my reading of the Epistles and Acts.
The use of the term Law is collective, it includes all the laws of God - both ceremonial, dietary and moral. I find this true in Paul, for example.
I follow a simple logic, if say that the moral Law is not included in the term 'Law', meaning that is something you 'can do', then there is boasting, no matter how much one denies it. You can boast. You may not boast, but you 'can' boast - that possibility is there. Yet the principle of faith says there is no possibility of boasting. Want some Scripture? Let's discuss them.
This comes down to also making faith a work, i.e. if that faith allows you to boast - it is not faith as the Bible speaks of- that faith is mis-directed and cannot be the faith produced by the Holy Spirit from the Word. Faith in the Gospel is an I-less faith.
We got it right if that faith eliminates "you" in the equation.