I don't think those blowers are as efficient as the ones that are available today, particularly latest-generation four-lobed and screw-type. More to your questions, I imagine a BDS or Weiand would look just fine there with Enderle fuel injectors and a hat. I don't think either of these companies make large 6-71+ sized blowers with manifolds for an LS-engine but I haven't looked that hard. You'd easily be able to find a Magnusun, Whipple, or Kenny Bell that would get close to poking a little out of the hood, but not like that. They'd be a lot more efficient than those old BDS or Weiands though...
To each his own
