Bunch of Noob question from a Dutchman

You'll need a center sump oil pan to clear steering linkage. Look on the block on the passenger side there will be a date of manufacture. As far as the differences go there are lots, there is high compression, low compression, open chamber heads, closed chamber heads, cast cranks and forged cranks just to name a few. The date of manufacture should help determine what you have. Get your self an FSM and the Mopar Engine Book.