signuture is wrong kept forgetting to change it. when i had my engine rebuilt they put some kinda performance pistons with a performance grind crankshaft and arp bolts and molly rings they told me either it can produce 310 hp or it is producing 310 wasnt listening to well just excited to be getting a new engine, at that time i knew next to nothing about internals of an engine. i am better educated right know about them but still always learning more, and i know i aint pushing that in hp, sorry.