If you are on moparts look up Dominic. He runs Thumpr carbs. You can probably find him on Facebook. If you can't find him, PM me and I'll give you his phone number.
Let him pick the carb and let him build it. The initial cost will be a bit higher, but the carb will work. And he answers his phone to help with tune ups. Don't buy an off the shelf carb.
Just my guess but I think if you call Dom he will tell you you need something along the lines of 1400 CFM.
Personally, I can't see any smaller myself but I'd let Dom help you as I've been wrong before. Many times.
