I've got my parts from Mike's Carburetors and I am diligently reading the instructions. "Tool No. T109-70 must be used to remove tube and to install new tube."
I see such a tool on line, Buy It Now, for $20. But it also looks like something I could cobble together. There's a narrow shaft about an inch or so long, with a slot cut in the end. Then the shaft fattens u[p and extends up a way, with a hole for a cross arm.
Comments? Experiences? Any other tools that would make the job easier?