Yes I belive that finding a "how to assemble a Para FAL A-Z" is kind of hard because much of it will be intrisically understood if you have all of the pieces on a table and can fondle them.
The big thing about the "para cut" receiver is that it needs the notch up front for the slightly different bolt carrier/top cover that the para uses.
The short answer is if you get the entire rear assembly from DSA etc (the $450 kit) you need only to notch the receiver to use it. Or buy a Para scope mount top cover as well, which doesn't have the ear. Can't remember now, need to look at it again.
Much of this was discussed a few years back:
If you search the entire forum for "para conversion" or "para receiver" or "para ____" etc. you should be able to find all the info you'll need.