The question that needs to be answered here is how much HP are you putting to the wheels?
Roto-Joints our the answer to guys that want full articulation without the harshness of the spherical rod end.
There's a limit though on how much force you can apply on a roto-joint and not cause damage to the delrin race(s) that the spherical ball rides in if you are constantly launching a car in a straight line application.
We have customers that have stretched the limit on what HP rating we recommend on not using them but as a company the last thing we want is to have failure in our products. I usually tell customers if your faster than a 1.5 60ft you should start thinking about a rod end for the fact you basically have a track car even though it's still street driven. Like previously stated I know we have guys running this fast still on roto-joints and they are holding up.
We run roto's on our 72 LeMans that has a supercharged LS and pound on it at the events we go to and it works flawlessly.
If anybody needs any info feel free to give me a call here at the shop.
Craig