Stall and Shift RPM Question.

My 904 shifts from 1-2 at about 3000.
If I put a 3k stall converter in it, what will happen?
Would it want to shift immediately after launch?
I believe I need to raise my stall just a little bit.
Comp Cams (XE268) says this is the largest cam that can be used with factory stall.
In gear, it want's to creep pretty good.
On top of that, my 'teen doesn't start pulling hard until about 2500.
With the low factory stall (feels like about 1500-1800) I think it would do me some good to get higher stall.
What are your thoughts?

A good 3k stall will work good. I have a dynamic 9.5" that flashes at 4,400 rpm in my 400hp 360. When idling at a stop sign I can let off the brake and the car will start to creep forward and roll, give it a little gas and it shifts into 2nd at 12to 13mph and into 3rd at about 20mph just like it's made to do. The best way I can describe a good converter is if you drive it like a little old lady it will act pretty close to a stock stall the more aggressive you get with throttle Input the more it will act like a "bigger" stall . If your the type to goose it with half to 3/4 throttle blips off a stop then it will most likely flash to it's built in stall. Best to call a good company because there is a lot more than the engine in picking a converter, like car weight, gear, tire size, driving in mountainous, hilly or flat land etc....