Hello! i have a stratocaster (replica) body without a neck. What should i look at? how do i know if the neck is suitable? Whats important, so i will not buy an neck that dont fit. sorry for my english! thanx
Lower down on the first page of the forum (at the time of writing) you will find this thread
which has lots of the information you are looking for.

We generally like to help around here, but we also like people to put a little bit of effort in themselves.