I have installed this kit in my 68. The bolt that needs the hole you can see in 2nd photo. The location of hole is adjacent to the hole in 2nd pic above brass connector. You should see where the metal is a single thickness vs double from factory for that hole. You will need a right angle drill as it is tight. I did it with it with pan on but it took some tinkering. Hope my description makes sense. The good news is this routing ended the problems of burning/blowing ps hoses with manifold interference.