833 23 vs.18 on 440/6

All 833s even the OD will work for you on the street if trans is in good shape.
I have never broke any with street tires and always treated them very mean.
You just can't get the traction to hurt them.
If you do happen get a good plant the driveshaft or rear axle will give up first every time.
Slicks on a sticky rubber coated starting line is when things can break and with manual gearbox they likely will at first.
I have always liked the the extra level of control over the machine the driver gets
with a stick. Worth the breakage in my opinion.
At 550 HP I myself would make sure to use solid u-joints and a Dana 60 axle to keep it together. I used to just break the 8 3/4s be damn'd and pick up another one but I consider it wasting a part someone else could be using these days.
23 spline will work well enough to find your weak link in the drive line.