The experiences big and small blk chevy guys have with tunnel rams on the street are not so with the 440 mopar. I have run an M1 with 2 500cfm eddies. Fantastic street setup. A guy on here ran one on his big block pickup truck and had no complaints. Keep the carbs small (youll have 2). I like the eddy 500s. If I were to run holleys theyd be the 600cfm vac secondaries.