Get my car to launch better...

I'm looking for your guys' thoughts on what to start on first to get my car to launch better. It's a street car, but I want to be able to take it to the strip and start bracket/index racing on the weekends. Here's my current set up and quarter mile performance.

72 Demon
4 speed
3.91 sure grip rear 8 3/4" with ESPO leaf springs
275/50/R15 Mickey Thomspon ET streets on 8.5" wide rims
pinion snubber
cheap shocks all around

LA 360 10.5:1 compression
Eddy heads
Comp XE268 solid cam
Air gap intake
Holley 750 double pumper
Small tube headers

Prior to getting the ET streets I ran a 13.93/106mph on street tires. With the ET streets I ran a 13.19/105.8mph. My best 60' time is 2.16 and I get some tire squeal as I leave the line, so I end up easing the clutch out as I feed in power making a gradual launch. I've also had wheel hop if I try to just power through the tire slip. I think with my MPH I could be in the high 12's.

Should I be doing a burnout with these tires (if so how much)? I try but I never get a lot of smoke that the other guys have when they burnout. I think this is because I don't have a line lock to hold the front brakes while burning out. Maybe I should be dumping the clutch in the burnout and then holding the brake with my left foot?

I've put together a list of things that should help transfer weight/plant tires better. Which of these would help the most/be most cost effective? I don't want to tub it, move springs inboard or lighten the car.

1. Line lock to help me heat up tires more, or use a better burnout technique
2. Put battery in trunk
3. Subrame connectors
4. Caltracs
5. Drag shocks
6. Use a better launch technique

I'm open to all suggestions, but I still want to be able to drive it on the street regularly. Thanks!