for you guys that have head studs, have you had any repeat head gsk failures while running the 310 or higher tunes? how are they holding up? loaded the 310 this weekend and played around for a bit and pushed some coolant out. i want to install the stud kit but am curious if the head gks are goind to last or is this something we are going to have to deal with with higher horsepower tunes. i think i saw a while back that arp and elite had stud kits, one set was smaller than the other?? which kit is availible and is there a better kit versus the other?