yea i did that my first time to atco. didnt even get a full pass, shut it off as i passed 330, brand new lifter destroyed. i use a hydraulic cam and apparently i set the lifters just a tad to tight and blew the bladders out of them a few feet into the run. then the weekend after that i went to numidia and thats when i found out that my freshly ported heads cracked and only got one pass there. the story on those heads and just that year in general is just depressing haha.