I had a stuck lifter on number 7 causing my car to mis I replaced the lifters and still have a mis how likely is it that the lobe on the cam is worn. the roller on the lifter looked fine and the push rod isn't bent.My set up is a b303 cam 1.72 roller rockers ported polished gt40x heads cobra upper and lower I have changed the wires plugs injectors cap rotor coil and tfi. Any help would be appreciated. Thanks Craig