So I started building another engine for the truck. 390 punched 40 over mild rv cam edelbrock heads and am going to see if the fitech throttle body injection system is any good. So I was torquing the intake down and had the intake bolt threads in the head strip. Don't have a clue how it happened. I don't use an air wratchet when putting in the bolts. Just been my luck with this build. Summit said they would pay for the repair or if needed will send me a new head. Just sucks.