I have an R33 RB25det and the bolt holding the idler pulley broke thrashing the head. I took it to a machine shop and only some of the valves are bent. The block is fine, I was in fifth gear at like 1300 rpms when it broke. Just wondering if there is OEM vavles from a different car or ones for a rb25det that I can get my hands on, also I am going to need guides and vavle seals. Any suggestions?