All things being "equal" it won't affect anything with your converters. Assuming you run the same lambda or % of optimal A/F ratio. The only thing that would hurt the cats is if you're running richer all the time and the reality is probably the opposite. With high ethanol content, because of the additional knock resistance you can run a little leaner than with pump gasoline and still not experience knock. But if the A/F is equivalent, shouldn't see any effects with the cats.
I’m running stock cats. I’ll order the fuel pump this week. Thanks for the heads up!!