I think that extra tubing would add too much weight to a car that's too heavy already. Ceramic coating the complete exhaust is my plan. Also, I don't really care about turbo lag. Driving around town I'll have a 500" SOHC to get me from stoplight to stoplight; no boost needed. In fact, if I had quick boost on the street I'd go from 600-700 HP naturally aspirated to 1500 HP and just blow away the tires. This engine won't need (or want) boost on the street, so turbo lag is not a concern.
At the track, I'll build boost at the line after lighting the pre-stage light by revving against the trans brake, then bump into the stage light with a bump box. That way when the tree comes down and the last yellow flashes I can leave with full boost.