Pro Form Carb main body replacements

Thanks for your reply! I do not know how it got cracked, but the crack runs across the face of the main body on the primary side! I understand that there is no way to mend concentracast white brass!? I did however put the carb back together after a thorough cleaning and combined with a clean gas tank, it runs well. Also, someone overtightened the Secondary float bowl and I'm missing threads on one of the 4 screws.

I am calling today for a hard copy of your much recommended book! I have read Bohacz's book on tuning Demon Carbs, and while it is good, too many things are left out. I am hoping that your book is "the missing link"!