ok first of all u have to decide what u want, it is very possible to put a cr/vtec engine into a crx, but is it a bolt up job, not even close, there are lots of choices for all the specific parts u can use, i guess my first question to ask you is how much power do u really want and how much are u willing to pay? u want it to be a n/a setup or are u looking to boost or shoot n2o? are u planning on doing the work urself or u planning on having someone else do it for u? any bseries engine will bolt up to a bseries tranny i believe (dont quote me on this) ur gonna want to use whatever ecu ur head is from to get the appropriate rpm and fuel/air ratios, injectors can be stock as long as ur not boosting or going into a crazy n/a setup. give me a little bit more info on what u want to do and ill let u know what is realistically expected, spark plugs and distributor come with the head that u put on the engine. u typically keep the stock manifold that bolts up to the head ur using unless u want to go with an aftermarket one, u will have to upgrade fuel components if there is a need for more fuel than the original system is capable of. let me know if u have any other questions