Why?

camaro off the shelf headers fit (forget what year but thats just a phone call away)

oil pan again isn't a problem.. if i remember it was a factory pan. (again just a phone call away)

engine mounts are or will be available soon from RMS. bill is gonna make them because so many guys called asking if he offered them the last couple of years.

trans mount has to be custom no matter what OD trans you use except for a stock mopar OD 4 speed or one of passons units, but being an original automatic car i'll have to cut for any manual trans too... no way around that. some require more cutting than others.

not much to figure out on my own. they are out there already. maybe not on this site or a place like moparts but they are out there. all my information for bolting it in is a phone call to RMS away. electronics info is out there all over the place.

i was at RMS early this year i think it was and saw the LS1 and OD automatic trans they got for 3K. they took a few quick measurements and some things actually look like they will fit better then the hemi. something was narrower. would have to find out for sure what it was. the hemi power steering pump puts some stupid kinds of pressure out that is a pain in the *** with my rack. the gm pump puts a normal pressure out so its a hook it up and go deal..