Hey guys, about 3 weeks ago I bought an 04 F250 ccsb. Well come to find out the head gaskets are blown. I have it at the shop getting worked on. My question is this: My injectors are two years old. Should I have them sent in and tested while they are out? They were done by RCD 180/75's. I would rather not spend the money, but at the same time Id love to have piece of mind and know they were in good shape. I would really like for this truck to be running great when it gets put back together.What should I do?