RE: Glow Plug Eater!!
It wouldn't hurt to pull the pipe out a 1/4" to 1/2" too. But do that after the new bearings are installed and you are satisfied with their performance.
I used to tune my pipes for absolute peak performance on the ground, then I ran into problems of not having enough stink in the verticals. Pulling the pipe out restored the vertical performance, but I also noticed an increase in glow plug life.
Ed Cregger