The dual plane IMO is a waste of money. There are better ones available for less or similar money. Ones like the Performer RPM. The stock intakes are pretty good, so really in the Performer series or M1 dual plane, you are just getting a weight savings over iron. The M1 single plane I've used a bunch, and I recommend it on a lot of builds. A good choice for a smaller plenum single plane is the Holley Street Dominator.