I would take the 2x4. I have the same. Run them the
first season and I can´t be more happy.
Tons of torque, great throttle response.
2x600cfm but still a little bit on the rich side.
I wouldn´t use the bigger jets Edl delivers with
the dual quad. I also do not like the comparison
of the different intakes. The cam should be grinded
to your specific needs. Mine is a solid flat tapped from
Scott Brown. Awsome power! And cheaper then the 2x3.
A friend of mine changed his 1x4 intake in his 68 charger
to a 2x4 and he said it was like putting in another engine.
Way better throttle response and awsome torque.