So I got a really good deal on some rebuilt injectors from the MB dealership and couldnt pass them up. I am going to swap them into my 81 TD, and was wondering what I needed. Can I just pull the old ones out and put the new ones in, or are there assorted parts and pieces that I should replace as well. I was going to do the fuel lines...but what else? Are there any kind of seals or anything? Thanks.