3D print, you say?
https://www.thingiverse.com/thing:4304481
Carburador de Fusca Brosol Solex 32 VW Beetle Carburetor
by scalla3d April 22, 2020
The philosophy for the VW Beetle IIRC was a 'large' displacemant throttled by the intake and pea shooters. The 36HP had a single 28mm, eventually the Type II had twin 32s and tuned header lengths inside the stock muffler.