I installed my 3000 stall-2.0 STR converter today.
Pretty rough job, considering I installed it all by myself in the my garage.
(on 6 ton jack stands) I took it for a short ride. It doesn't shift as hard as it used to. Hopefully my times improve. I cut 1.47 60ft times pulling the front tires about 6" with the stock converter.

 

Get it out to the track and give it a try! You'll love it!

 

I just had a Yank SS3200 installed by Doug Rippie in my H/C, longtubes, dyno-tuned, etc., etc., car. I had him increase line pressure a little (torque management was already gone), and adjust shift speed. The car run s great now. Yur shifts will be softer without a computer tweak. Congrats on your car!
Ed

 

When you change to a 9.5" torque converter from the stock 12" in an LS1 you lose about 30 or more pounds in weight. This will give the "appearance" of the transmission shifting softer, when in fact the transmission is shifting even quicker due to the loss in weight (on the back of the crankshaft). The transmission does not have to work as hard to slow down the reciprocating mass on each shift change. If you want to have more "shift feel", you will have to work with the accumulation and feed hole sizes in the valve body plate. In most cases you will need to address the feed hole sizes in the valve body plate, & raise line pressure some to improve the capacity (holding power) of the 2-4 band and 3-4 clutch pack. Taking all of this extra weight off the back of the crankshaft is much easier on the rest of the gear train in terms of shock, and can only improve durability.