Get my car to launch better...

Brad - I'm running Mickey Thompson ET Street Drag Radials. Am I missing out on that much by not having a full slick? I heard great things about those drag radials, but if full slicks are that much better I'm game for trying a set out. I currently have the adjustable snubber set about 1.5" below the pan, and I'm leaving at 3500rpm. I had traction problems trying to leave at higher rpms or by just dumping the clutch.

You are missing a lot of performance if you are spinning at all. It is difficult enough to be consistent with a 4-speed, if you are spinning at all you are shooting yourself in the foot. I would also set that adjustable snubber at least one more hole up. I used to run mine no more than 1/2" from the floor while at the track and then adjust it back down to max travel for the drive home.

cudaspaz is also right. You need to get a line lock and do your burnouts in second gear. Stay in the throttle on your burnout and then release the line lock once the engine starts to bog from the slicks starting to grab.

Another trick is to lock your right leg to the floor immediately after you launch. If you don't already have one, get a rev limiter so you don't blow the engine in case you miss a gear. Don't let your gas pedal come off the floor at all after your launch. Just quickly step on the clutch pedal with just the toe of your shoe and then let the pedal slam back up as soon as you've got it in the next gear, but don't move that gas pedal from the floor.