Roy,
i did al lot of reseacrh on the ls1tech board and found several people had engine (rod) failure after they installed the arp's
and found NONE failures for the Katech's
ARP clearly states that the rods need to be resized for the bolts, and for the KAtechs that is not nessesary according to theselves.
it could be that arp is just saying that to cover their buts and the bolts are the same, but i'm not sure i want to take the risk
the original bolts allso seem to allow some people to do 6500rpm +
but thats a risk i'm allso not willing to take.
now if somehow i could see both these bolts and measure them next to eachother, maybe then i would take the arps if they are the same
apparently the arp's are somewhat longer and would need a rebalance ?
http://www.ls1tech.com/forums/showthread.php?t=659266&highlight=rod+bolts