177 supercharger

IMG_0101.JPG Ok, "Instant power" means a Roots blower and pretty much rules out a Centrifugal blower, unless you're running a loose converter......
I'd suggest running a 6-71 blower manifold(3.5" tall) simply because resale value or ease to sell and gives you an easy chance to upgrade to a bigger blower, in the future might be easier. The ModMan intake (5.5" tall) will work for this application as no pop off valve are required when using a serpentine belt drive. I'd recommend a 10 rib setup.
Either manifold will require a custom adapter plate to mount the blower. Careful measurements and planning will dictate how long a snout you need and location of blower. The closer you can keep the blowers crank pulley to the balancer, the less stress will be placed on the crank. These types of blowers are around 6" tall....

IMG_0102.JPG