so before people start hating cause this a dumb question... i dont know much about modding cars and such so just keep that in mind and bare with me... So i shop online on CariD for my car parts a lot. i want to buy a LDK long block off ZZP but i wasnt sure if i were to buy parts like a cold air intake or exhaust or headers and such for the LSJ engine that im saying im driving with would i be able to put those parts onto the LDK instead once its swapped? or would i need to get different parts for that engine? Thanks

 

They're completely different engines from the same family (Family2).
To swap an LDK long block into an lsj, you would have to do a complete LNF harness swap. It has been done, but is really not worth the hassle whatsoever.
The LDK-j (gen3 LSJ) short block that ZZP sells has the crank reluctor reclocked so that everything is plug and play. I would not call it an upgrade though, just a cost effective replacement.
You have to stick with an LSJ head, so header/intake/etc would still be applicable.