Anyone have any problems using oversized valves (.5) with skunk 3 cams in Gsr head with 85mm je pistons 12.5cr.Pulled the head today found all four valves bent in #1 cyclinder.Also saw marks on the exaust valve reliefs.The valves in the rest of head were ok.Could it have been that 4 degrees adv on the exhaust cam is too much.Stock thickness cometic gasket.Thanks

 

anyone please!