[wkooiman]

Pros:
- They look cool, especially with s&h air cleaners.
- Probably makes slightly more HP
- They can clean up the idle on an overcammed engine. Remember how people sometimes drill the throttle blades to avoid exposing the transfer slot? It's less likely on 2x4, because you have 2x the idle adjustment.

Cons:
- Cost
- On a 302 non-Tunnel Ram, they are probably Carter/Edelbrock style, which are okay, but there isn't as much expertise tuning as with Holleys
- Maybe side hung floats, which don't corner as well. When the gas flows to one side, they like to stall the engine.
- Linkage can be difficult if you don't have the right parts

Don't believe anyone that says it is too much carburetor. If you do 2 660's with 1-1 linkage on a 302, yes, it's too much. If you do 2 600's with vacuum secondary with or without progressive linkage, it's perfect.

Remember, the vacuum secondaries only open if they need to, so 2 600's vacuum secondaries are the same as 1 600 double pumper, which runs great on a 302.