It's a fair point, I find many people actually prefer building/speccing cars than driving them sometimes.

As you say, I'm not sure there's a big market for V8 powered Sierras. If you wanted to see any decent money back out of it, you would have to break it IMO. Which is a shame, but at least you won't be quite so envious when you see it around.

At the end of the day it's a lovely car as is , you have to ask whether you would actually be moving 'on' with another project though...