I have a question for you experienced experts. How tough is it to replace the engine? Having replaced engines before, including an older Honda CVCC vacuum line/sensor beast in a '78 Accord, I am not afraid of work; I am worried about needing a workshop of special tools, or tricks/procedures that make it impossible to execute correctly the first time. Pilots have a saying: "Experience is what you get right after you need it." I have a '94 LE/SC/AWD with 289K miles that is diagnosed with a blown head gasket, and I can't find any other vehicle new or old that has the same utility as this van, especially in the wintertime or in the Rocky Mountain region.