QUOTE(Jerry75914 @ Sep 22 2010, 12:20 PM)
"one inch of thread" sounds like you have the shorter 25mm bolts...NOT what you want. I had those when I got the car, and they did not thread very deeply into the rotors...scary.
You need the 38mm bolts. if you are in the Bay Area, go to Parts Heaven in Hayward. They have some reproductions that are well priced.
So when you say 38mm, that's 38mm of thread length? These bolts do have about 25mm thread length.