Try to find an automotive class at the local vocational center or adult education center. Beef up your automotive IQ. If you're asking about PCV's at least google what they look like and look for it on your car. If it was a snake ....
If you're writing checks just take it to the shop that's installing the EFI and tell them to figure everything out as they should know what a PCV is. At that point all you have to do is put gas and oil in it.