Travis,
The pumps are the same for either carb. What you are going to needing to look at are the inlet/outlets. The differences in the pumps at the parts store will be whether they have one or two outlets. Some have a 'return to tank' line which makes the pump have an extra 1/4 inch line running out of it. So, take your pump off first and take it in with you. Visual aids always help the counter guy. Any Pontiac V-8 pump will work as long as it has the right outlet(s) and inlet.