low-reverse servo piston breaks

Are these pistons designed any different or just stronger? Anything else I should be looking at that may be a weak link while the trans is out?

I have seen that there are various designs to the piston and some people say it is because it gets cocked in the bore and breaks. But I think my issues is the line pressure.

Let me know what else you would reccomend because it is getting a 416 stroker in front of it in the 500+hp range now.

thanks!