You will need new bottom metal, and a new magazine box. If you use an ADL stock, you'll only need a new trigger guard. When I switched to a 700 short action stock on my 722, I found that the old magazine box was too long. The spring and follower works fine, though. You will have to relieve the stock around the safety, tang, and the aforementioned barrel boss. It's the work of an evening in the shop or in front of the TV. (Although my wife did question the little plastic shavings on the couch, so you may want to watch that.) Changing to a more modern stock design certainly makes the old Remingtons more shootable.