65 Barracuda 187 code!!!
That's cool that you asked your little sister to help. :prayer: The rods are factory stamped IIRC. The cap and the rod should have corresponding numbers stamped on them, and should be put together so the numbers are on the same side. Make sense? Also, if I remember right, the numbers should face the outside of the motor when they are assembled to the crank. The pistons have notches on the top, and those should face the front of the motor. If you can find the book, "How to build small block Chrysler engines" or something like that?, it will be a great help to you.
Edit....found a link. The book I have is the one that has the dude in a blue shirt with a stripe running down it. The newest book at the top may be the most up to date.
http://www.amazon.com/s/?tag=fabo03-20