tell the person writing your tunes for you that you dont want more than 10 degrees of timing since you have stock head bolts, you should last quite a long time with that power. if you were to go to 14 degrees, you would probably compromise the head gasket in a matter of days. i've ran many many different programs and had my truck up over 400HP with my stock head bolts. i am now running sct with matt's tunes at 10degrees and i feel comfortable, it is very safe power. of course it could be faster, but until i put these enormous studs in i will be happy with the power i have.