i have a 440 with about 3k miles on it . it has a solid roller cam 906 heads. 30 over trw . steel crank . torker intake (temporary) with a 1050 dominator . im running crank case evac system . i took a out of town family member for a ride . mashed the throttle . it seemed to hesitate alittle and heard pinging . when i got to the house i noticed the valley pan poped up. i have been running this motor with no problem . plugs look good . i shouldnt have blow by and the only thing i have changed was putting alittle more timing in it , which is why i heard pinging would that cause the valley pan to push out?
