The kids at my school don't get it!

That's one pretty little Plymouth. My first car was a 65 Dart GT 273, 4 spd. All I wanted to do was stuff a big block in it. It never made it that far, some one in a Dodge van crossed the center line and hit me head on and totaled it. If I had something as pretty as your car I'd leave it just like it is and find a clone and put a big block in it. That way you show up at school with the slant 6 as bait, and then show up at the track with the big block. Good luck and welcome from Maryland, Joe.