Ive been well over a 1000 for a couple years now. Its a 230 block partial fill. steel caps. 3/8" thick girdle, Studs everywhere the girdle. I have also had good results using 3m weatherstrip adhesive on the girdle to block rail. I apply it liberally install the girdle and then bolt it down for a few days to dry before installing the pan. I get zero leaks and no shifting from the girdle. Only sucks at refresh time.. My motor is also boosted so I only spin it to 6800.