bang for buck is a stroked hemi motor hands down. It will be more reliable, better on gas and fun as hell!
Parts are cheap if you buy used on a lx forum, we got maybe $2k total in our Charger, 12.4 1/4 mile on 22's. I would consider that a sleeper car.
Headers, flowmasters, CAI, Predator tuner and 150 shot.
The Vortech kit is good if you have to get the emissions as their canned tune will get you through! Other than that, any supercharger kit I would recommend a custom tune (I went with Diablotoona / Johan from Diablosport) to fully unleash it! I really need axles and slicks to launch my car but I'm happy with it so far on my unopenned stock engine.
If I had an automatic though I would have gone with a positive displacement style instead of a centrifugal, like a Magnuson (also 50 state legal) or Kenne Bell. Good luck!
I got buddies with stroked engines, I can ask about mileage and what would be best route to take.
Yea, weak point on these cars is definitely the axles, a few guys here are using the Ford 9".
In an LX/LC chassis? I'd love to see pictures of that and know what it would take to do this!!!