[Miataracer]

you need to get the whole swap, engine, tranny, mounts, ecu, cv shafts, etc

your old motor is not worth much, but you may be able to part it out and do ok

b16 bottom end can't hold a ton of boost, it can do ok if tuned properly but for high boost it must be built up

there are lots of places to get engines. do a search and read everything you can... there is a lot to learn and i would suggest you learn as much as possible before making your choice