I recall the systemax heads/explorer intake story on this website, i believe, and if i remember correctly, the guides wiped after 10,000 miles. Is this a common problem w/ these heads, and if so, i presume it is due to the valve train geometry with the pedastel mount rockers. I know from personal experience that trick flow had this problem with their pedastel mount heads, and has since eliminated these heads. My friend is about to buy the systemax kit with cam intake and heads, and he doesn't want guide problems. If there could be guide problems, would going to stud mount heads eliminate this? Thanks.