Aside from QC problems (the people assembling them in Guangdon will not be driving your car) they are not accurately spec'd to your engine, but (IIRC) an average of the range of L6 engine types (OHV and SV) and displacements they anticipate as buyers. This includes 216, 235, 261, GMC, Chrysler Spitfire, Ply-Do, Ford 223, Pontiac 239, etc.
There really is no universal replacement carburetor.
