You need a common plenum below the blower. The tunnel ram has isolated front/rear runners. The twisted rotors in a Roots "71" series would tend to push the air and fuel to the rear. Resulting in a terrible imbalance. That is a nice setup, there are 'blower spacers' available on ebay and BigAlsToyBox. Unless you got deep pockets and get a Super Chiller fron BDS. Good luck on your build.
