That type of fan design will not produce any signifigant pressure, and the rpm is not high enough to produce enough CFMs for a V6, let alone a 488 cubic inch V10. That fan design has forward curved blades, that produce fair amount of volume, and some pressure, as a function of RPM, but this type of fan design cannot supply any real pressure when the air flow is restricted, in other words, its got no closed circuit pressure. So coupled to an engine, the air flow is restricted, the air flow slows, and the pressure drops to almost nothing. The best that can be acheived with that design is only a slight increase in performance, at fairly low RPMs.
Been there, done that, (not on a Viper, was done as an experiment on a V6 Dakota). I even went to the next stage, with reverse curved blades that produce more pressure, but it still needed more CFMs. An AC motor, fed with Variable Voltage and Variable Frequency, (VVVF) would yeild a blower that could follow the varying CFM requirement as the engine RPM changes, negating the need for a blow-off valve. Interesting project, but not worth the time.
A Roots, or twin screw blower already has the proper characteristics for the Viper, provided the correct size pulley is used for the right CFMs. Then the next hurdle is the engine tuning, fuel mix, spark advance, etc. That is the hardest part, the engine tuning.
You gotta respect Doug Levin, Sean Roe, et al, for all their engineering.