Why a roots and wedge instead of a HEMI and screw.....rules???
Couple different reasons....alot cheaper being primary, can weigh 300# less than the screw, did I mention, alot cheaper....a Hemi w/ a "C" screw runs about $50K used w/ fuel system, MAG, etc, ours is $25K.
Another reason is that we want to go just as fast, but with alot less!