You can look at the numbers from the venders I posted and find which ones fit 230's or 250's, both will work. Once you get the number, then ask around.
Pontiac, Olds, Buick, GMC, and Chevy all used 230 and 250 inline engines, you have a hugh range of carbs to choose from. They all will be some what identical except for minor metering changes and vacuum ports.
Joe
