another 426 hemi swap question

i really dont want to have to post about a hemi swap question im sure i am the 1000 person to ask this but i could not find all the info i need off the search bar but here it go....

i have a 72 demon that i am going to put a 426 hemi in and really just got few simple questions such as is there a engine mount kit if not where do i go to make this eng. go in to the car also exhaust where do i get headers for it ...if anyone uses the search and finds some of the info send me the link thank you.