hi
Have a 72 GMC stepside with a 402, TH400.
drove home and ran like crap. bought it that way.
did comp ck- # 5-6-7 at 25 lbs. pulled valve covers and all intake valve push rods on those cyl. bent. some rockers were sideways. I know I have to pull heads but does anyone have any ideas. don't know if pistons scarred and if valves bent yet.
thanks for help