SB turbo headers?

Mines 428cid stroker, ritter block, diamond boost pistons 9.03:1, cometic MLS head gaskets, arp studs heads and 4 bolt mains, callies 4"crank, compstar h beam, edelbrock magnum ported heads, super victor ported efi, custom billet Crower turbo cam, hughes 1.65:1 rocker kit, 90mm tb, 160lb injectors, custom 1 7/8 turbo headers, n/a roughly about 600hp plus estimate, after boost low (8-10psi) 1000hp, little higher (18-20psi) 1600hp