RPM air gap, both Magnum and LA style, are the tallest small block dual plane intake I know of and they fit that body with any Edelbrock or Holley style carb with a regular 4150 square bore, but often requires the use of a drop base for air cleaner.
Since you're asking for carb options I assume you are keeping the mechanical fuel pump. If so, you can run an LA timing cover and water pump and go with the Chinese made air gap copy manifold with dual mounting bolt pattern. This lines up the bypass hose the best.
If you plan to run an electric fuel pump anyway, keep the Magnum front timing cover and water pump, along with the alternator and bracket, so you can run the serpentine belt, and then the Edelbrock Magnum air gap lines up the bypass hose the best.
If you plan to run Engine Quest or Indy/RHS heads with LA intake bolt pattern, the LA timing cover and water pump line up best with Edelbrock LA air gap or Chinese copy best.
Mixing up these combinations can be done as many have proven, but then you have to figure out what adapter fittings to use to get the bypass hose to line up decent without kinking.
PC MOPAR Plymouth 340 360 Magnum Air Gap Dual Plane Aluminum Intake Manifold | eBay
