Thank you! I really tried searching, but was not able to find it even though I tried for a long time.
I actually had to put some of my own engines on the bench and do some measurements.
I`m just trying to make up some outboard pipes for the 91, and probably for the 67 as well, that`s why I needed the numbers, and of course I am lazy so better ask instead of bather with the measures my self. LOL