[tall terry]

Toss the carb,,, a broken float pin pillar junks the carb...
A 42 low speed jet with the a/f mix screw out about 3 turns usually runs well,, then set the idle..

 

[tall terry]

Yes... the carb body is now a paper weight...
the pin boss,, is directional.. I think you stsrted or finished from the wrong side and broke it. then you priced the obsolete carb,,, and got sticker shock. 27421-99C,, at nearly $400.. and decided to weld cast zinc..
And here we are...