J-head to eddie swap?

Believe me, I AM STILL LEARNING! This being my first REAL muscle car. I have learned quite a bit from this forum about mopars in general. I must be doing something right though.......(it's still runnning). I am not looking for 500hp out of my engine. Just something to pin my skinny *** to the seat when I nail it. I know I am going to have to address alot more than just the engine sooner or later. I am running 3.23 gears with 205/60/15 street tires and a pretty whimpy 904. I really want to get it out to a track this spring just to see what she will do. Again, I want to thank all of you for sharing your knowledge and helping me out along the way.