Got a 5.2/5.9 Magnum? I need a favor, please.

Greg, It's 1 5/16 or 1.3125.

I too am using a Professional Products intake that is drilled for both LA and Magnum heads. The ports are in the same place between the two heads. There is no reason why you shouldn't be able to use the magnum fuel rail to build EFI on an LA intake.

If you want the Fuel Rail (and injectors) off the manifold in the picture you can have them for the cost of shipping. I only kept that manifold becuase I figure some one may have a need for it or the parts.