The 400 and existing 350 are shot. New ones should be forth-coming. My question is how long will the swap take? The plan is to have the assembled engine/tranny combo ready to slam in once the old combo is out. Everything but the brackets and pulleys will be on the new engine before we even start. I have a friend that is helping me do it that says we can do in in one day. Got a shop, air tools, etc. to make it as east as possible, but it has to run on Monday.