Not as long as you know what you are getting into. I had a rule of thumb with my build; it ran and drove when I tore it down, it should run and drive when I put it in the goblin. In another words, as long as you don’t mess with anything other than thinning the wiring harness (like instructed) you should be fine. Once it’s in the goblin and confirmed running and driving, then you can mess around with everything.
With that car already highly modified, you will have the element of the condition of the engine/mods. hopefully they will give you their hp tuners stuff so you can mess around with everything when the time comes.
as far as ordering from DF. You’ll order a kit for a supercharged/manual, not a turbo. Everything you do will be as if it’s a stock supercharged car.