Turbo 383 in a A-body Barracuda

A Walbro GSL-392 has the check valve in it, they are cheap and super quiet. I am running 3 all at once and you can barely hear them running. You do need a return though.
eBay has the best prices on them. They say 1 is good to 600HP on a boosted EFI set up. Carbureted I would think a whole lot more than that. Maybe sell your A-1000 run 2 of these and use your controller to turn the second one on. You would make $$ on that swap.