I just had to get a new water pump for a 350 cause my old one was leaking out that weeping hole, and the one that I got wouldn't accept my old bolts for the fan and pulley! They are 5/16 - 24F and I even got new ones and got some M8 bolts thinking maybe it was metric, nothing would fit, so I ended up tapping out the threads in the pulley mount and now it fits fine, I was just wondering if anyone else experienced this? I couldn't find any bolts that would fit this mo fo.