Rebuild or leave trans?

Have you used the gear ratio's and your new cam's power band top end, and computed where your RPM's will be when you shift from 1st to 2nd? If the RPM's are well into the cam & engine's torque band when you go into 2nd with present gears, then the jump should be OK; I imagine you'll just need to be a lot quicker on the shifter. Then check the same thing for the 2-3 shift.

Then recheck the road speeds for the light throttle, low RPM shifts for everyday driving and see if the shift speeds for 1-2 and 2-3 seem too low.

I'd try it and see what you think; you can always change it later and you will learn the feel of that particular setup, which will add to your overall knowledge for the future.

I've calculated a few things, but mainly the change in RPMs when I'm driving. But changing the gears wouldn't change the shift points though? Or would it? Currently the trans shifts at around 5600 and it could be a bit higher, but matches decently with the new cam. I'll have to calculate a few things still, but I assume I check a lot of that stuff by actually driving the car?