Never tried this before!

i just bought a '73 rust free dart for 2000 bucks in primer and needs painted. It has a 318 stroked to a 390 with heads intake cam headers with a stupid ford 9in. I'm currently stroking a 440 to about a 496 all the same fun stuff as the 318 minus the ford 9in (trying to find a dana 60 or a 8.75). Where do i start putting the big block in the car? Do i need a k-frame, special oil pan, headers, motor mounts, will it clear the factory steering linkage, or any body mods? Thanks for the help!