I don't think there is any question about the "WOW!" factor, but a good single 4-barrel on a decent intake will put a 6-pack on the trailer 9 times out of 10. The 6-pack intake has some flow problems that are almost impossible to deal with.

If you're asking the question I'd suggest looking at an Edelbrock Performer RPM or Holley Street Dominator topped by an 800-cfm Edelbrock Thunder Series or Performer Series if the Thunder Series is too pricey.

Also, the 6-pack flow rating if compared at the same pressure drop as a 4-barrel would be 850 cfm.

R.