increasing stall speed and rpm after shifting


hey all,
this is more of a general question , rather than looking for exact numbers.

im contemplating increasing the stall on my vigilante 9 1/2". lets say im at
3400 rated stall now. lets also say im going to increase rated stall to approx.
5000. will this change in stall speed, let the motor recover at a higher rpm,
after shifting into each gear. this assumes i am NOT locking the converter.

i would assume that a higher stall speed will slip the motor to a higher rpm
after each shift, but ???????????????????? im not sure