new to 5.7 hemi swap..

You'll want to get the appreciate swap mounts, you'll need some type of electronics to run the coils, like the hemi6 with the proper harness, one for efi, one for carb. Look into exhaust, tti has a set of 5.7 hemi swap into a-body, you'll need a oil filter relocation kit, tti oil block plate, which blocks off the current oil filter location, some people have had luck with running the oil filter 45* adaptor by trimming the sleeve on the adapter, and running a smaller or shorter filter.
Depends on your Trans, 727, A833, or if your going with a modern Trans,
727 there is an adapter,
A833 you have to trim the the input shaft 5/8-7/8 of an inch
Modern Trans needs tunnel work.
Carb options, Elderbrock, dual quad
XV carb setup
You'll need to run a fuel pump for the hemi