I can't imagine trying to get the air flow to cylinders #1&2 and #5&6 equal
There was a street racer in SO CA years ago that had a 1971 Boss 351C Mustang with a tunnel ram with either two 850 CFM Carter Tquads or they may have been the bigger 1000 CFM Competition series Tquads
I beat him with a strip out 340 1970 Duster 4 speed car with 4.89 gears and a set of NHRA legal 9x29x15 Firestone stocker slicks He was a real tire spinner also