RE: Rem 700 Standard vs. Youth?
Yes, mechanically, the regular ADL and the ADL Youth are EXACTLY the same. Other than the stock, the ONLY difference is the barrel length. (The ADL comes with a 22" barrel....the ADL Youth comes with a 20" barrel.)
I purchased an ADL Youth, in .308, specifically because I wanted the 20" barrel. I did exactly as you are thinking....simply switched to the adult-sized stock. Great rifle - I cannot say one negative thing about it.