Interesting stuff, i was aware that G40 bolts were specific and longer than the others but i didnt know that they were higher in tensile strength....
In my case i have a skimmed head and a lightly decked block and am going to using a metal head gasket as i expect to be 200+ bhp. I planned to use non-G40 bolts when i build the engine up in a few weeks as they were shorter and certainly dont want to bottom out with the longer ones, so my question is to those in the know, can you get higher tensile strength bolts in the shorter length from anyone or do most that need to use the shorter bolts just go with the 8.8's?