Holley Street Avenger on 408 / 416

Anyone install a Street avenger on their small block stroker?

I installed a 870 cfm Street Avenger on my 408 and it stumbles horribly. Want to know what modifications others have done to the out-of-the-box carb before I start experimenting with accel pump nozzles and jetting.

408 4spd 3.23