So i got another 426 from a guy who owed me money but the thing is not running...im going to get it going again but i need quite a large amount of parts... What happened to it was the cam chain slipped due to exsessive wear and stretching and the piston smashed 2 of the exhaust valves. one broke off and embedded into the top of the piston. As the engine wound down after this catastrophic failure, the valve that was in the piston hit center of the cylinder between all the valve seats.. its pretty gouged but the head doesnt look to be cracked. Is it safe and/or practical to try and clean up the old head and try and use it again?? New heads are around $550 and im trying to get by w/o buying one. What do yall think??