Originally Posted by Molon Labe
I've read a lot of negative reports on the air gap on a street car. i'm actually thinking about the Performer and not the RPM for the performance off idle. Height is a consideration too as I don't want to poke a hole in the hood.
You won't have any carb stud interference in a '67 Fairlane if you use proper motor mounts and stands.
The Performer might have better response immediately off-idle, but only up to 1500, where the taller manifold takes over and runs better than a single plane intake to 5500-6000. If it is important to you to make power between idle and 1500, then go for it.....
With a small British roadster, you might find some room for a taller manifold by massaging the motor mounts and using a drop base for the air filter, or even mounting the air filter remotely. Personally, I wouldn't let ANYTHING get in the way of a taller dual-plane intake manifold for street use.