340 swinger

This is one nice dart. What happened to the original 340 in it? Not putting it back in?
The numbers matching 340 is on a stand in the garage. I figured i would spare it the thrashing and leave it on the stand. One thing leads to another and before you know it your building a stroker, aluminum heads, intake, deep pan,etc. I hope to maybe rebuild it to stock spec and just have it for a conversation piece.