Hemi in a Dart

I've built street rods for years, mostly with Mustang II suspension, Chevy engines and the like.
I'm giving serious consideration to putting a 426 Hemi in a 1968- 1969 Dart. With that in mind, I have the following questions:
Will a 426 Hemi fit in the 69 Dart engine bay without having to refabricate the engine bay sheet metal?
Is after market sheet metal available, such as inner fenders.
Will the stock suspension carry the weigh of the Hemi, and if not where does one go for upgraded suspension parts?