K frame and motor mounts swap and it is all bolt in. Or, some Schumacher conversion (or whatever they call themselves today) mounts onto the std V8 K Frame could be used. However, you would need to modify the #1 Hemi Header tube slightly.
I had to change the starter battery cable, and it is pricey, the bracket that bolts to the block that holds the cable and depending on what manifold maybe throttle bracket and throttle spring bracket. I did have a 440 in before the Hemi, but the above from it didn't work for me. Car is 71 Cuda original 4 speed and I went with the Kiesler 5 speed when I put the hemi in. Engine is a 472 crate from Mopar and I have about 20,000 miles on it. I also went with the stock cast iron manifolds to eliminate any header issues. Swap was done in 2002, and I used a Hemi K frame that was done by Hemispherical Products.