How to tell if you are overcarbing an engine?
Air Gap, RPM or LD340 are really good intakes. All work about the same. Even the performer 318/360 works well with a little elbow grease in the intake ports and a 1" spacer.
Always better to spend $ once than multiple times when direction changes. It's tough buying 2 or 3 of the same item because the wind changed direction. BTDT! LOL