Cubber,
welcome to the site.
IMO, you should jump on that Larrowe & sons blower manifold.
As far as being a bit easyier to install.

Otherwise, if you can fab up some brackets as I did, use a centrifugal supercharger, they can pump much more air than the smaller superchargers & heat the air less.

http://prostores1.carrierzone.com/servle...hevrolet/Detail


I am trying to remember, if it has a 271 blower pattern or a 471,can't remember for sure?

Run a 144 Weiand blower or other supercharger that will fit & can pump enough air..

If you build a purpose built engine for a supercharger & use a big enough blower, you can make 300-450 HP faily easy enough.
Don't know how much power you are hoping to make?

My Paxton supercharger was the older ball driven blower & I could only make 8-10 PSI max.

I estimated about 400 HP to the wheels, never took it to a dyno or a track but I raced friends cars that raced there cars on a regular basis.
1/4 mile was approx 12.6-12.3 range.
Maybe these pics can give you some ideas?





















MBHD

12 port SDS EFI