Mine was originally using a Walbro fuel pump and adjustable FPR, everything else was XB system; this was when I was still using the Blast frame with a Firebolt subframe. Since I switched it to a Firebolt frame, I'm using the XB pump as well now. I'm considering changing that back to something unregulated so I can use an AFPR again for upcoming modifications. Need more fuel, injector is already maxed.
One of the other EFI'd Blasts I advised on is running the Walbro/AFPR as well, he's only a couple hours from me. It's an otherwise mostly-stock appearing Blast.