If you are going to work your way up to a 454, why not just go that route first instead of putting money into something that you already that has major problems. While there are not an over abundance of 396's they are not rare and it sure is not rare enough to bring a big amount of money when it is stuffed into a Buick Regal. But if you are bound and determined to go with the 396 then go right ahead. In your first posting you asked about sleeving it and got two negative opinions. Now you ask about sleeving it again. Do what you feel like you can afford. If you don't run it balls out all the time after it's put together you should be alright.