There's a lot of litting things to add to that.
However, a NP231J will work behind V8 power mostly without issues. A HD SYE is a must, and the front output is susceptable to failure, but it's not a huge deal for the typical wheeler.
Exhaust has to be adressed too. Along with things like the ACC drive (Which may or may not come with the engine, and may not fit). The distributor on the older (HEI) engines will massively not clear the firewall.
Oh, you can put an AW4 behind a SBC too. It'd be okay.
It can either be really cheap or really expensive depending how you do it, and what parts you buy and for how much.