I wouldnt say 2 x 4 are Bad. Several famous muscle cars from the late 60s had fast ETs with 2x4 ... Ford, GM and MOPAR all had high end Muscle running this setup.
Tru I agree tuning is a little tricky with 2x4 and with modern intake design it has been proven that a Single Plane intake with DP Carb will make for better performance.
2000 SLP SS M6 few mods. (sold)
2000 FRC cam and headers (daily driver)
1977 Corvette LSx cam and stall with a CARB!